tests: always make bundles, adapt build and tests

Make test bundles the default. Drop non-bundle build mode.
Also do all the optimizations and tidy-ups this allows, simpler builds,
less bundle exceptions, streamlined build mechanics.

Also rework the init/deinit macro magic for unit tests. The new method
allows using unique init/deinit function names, and calling them with
arguments. This is in turn makes it possible to reduce the use of global
variables.

Note this drop existing build options `-DCURL_TEST_BUNDLES=` from cmake
and `--enable-test-bundles` / `--disable-test-bundles` from autotools.

Also:
- rename test entry functions to have unique names: `test_<testname>`
  This removes the last exception that was handled in the generator.
- fix `make dist` to not miss test sources with test bundles enabled.
- sync and merge `tests/mk-bundle.pl` into `scripts/mk-unity.pl`.
- mk-unity.pl: add `--embed` option and use it when `CURL_CLANG_TIDY=ON`
  to ensure that `clang-tidy` does not miss external test C sources.
  (because `clang-tidy` ignores code that's #included.)
- tests/unit: drop no-op setup/stop functions.
- tests: reduce symbol scopes, global macros, other fixes and tidy-ups.
- tool1621: fix to run, also fix it to pass.
- sockfilt: fix Windows compiler warning in certain unity include order,
  by explicitly including `warnless.h`.

Follow-up to 6897aeb105 #17468

Closes #17590

.github/workflows/non-native.yml

@@ -64,7 +64,7 @@ jobs:
             time sudo pkgin -y install cmake ninja-build pkg-config perl brotli heimdal openldap-client libssh2 libidn2 libpsl nghttp2 py311-impacket
             time cmake -B bld -G Ninja \
               -DCMAKE_INSTALL_PREFIX="$HOME"/curl-install \
-              -DCMAKE_UNITY_BUILD=ON -DCURL_TEST_BUNDLES=ON \
+              -DCMAKE_UNITY_BUILD=ON \
               -DCURL_WERROR=ON \
               -DENABLE_DEBUG=ON -DCMAKE_BUILD_TYPE=Debug \
               -DCURL_USE_OPENSSL=ON \
@@ -110,7 +110,7 @@ jobs:
             time sudo pkg_add cmake ninja brotli openldap-client-- libssh2 libidn2 libpsl nghttp2 py3-six py3-impacket
             time cmake -B bld -G Ninja \
               -DCMAKE_INSTALL_PREFIX="$HOME"/curl-install \
-              -DCMAKE_UNITY_BUILD=ON -DCURL_TEST_BUNDLES=ON \
+              -DCMAKE_UNITY_BUILD=ON \
               -DCURL_WERROR=ON \
               -DENABLE_DEBUG=ON -DCMAKE_BUILD_TYPE=Debug \
               -DCURL_USE_OPENSSL=ON \
@@ -137,7 +137,7 @@ jobs:
       matrix:
         include:
           - { build: 'autotools', arch: 'x86_64', compiler: 'clang' }
-          - { build: 'cmake'    , arch: 'x86_64', compiler: 'clang', options: '-DCMAKE_UNITY_BUILD=OFF -DCURL_TEST_BUNDLES=OFF', desc: ' !unity !bundle !runtests !examples' }
+          - { build: 'cmake'    , arch: 'x86_64', compiler: 'clang', options: '-DCMAKE_UNITY_BUILD=OFF', desc: ' !unity !runtests !examples' }
           - { build: 'autotools', arch: 'arm64', compiler: 'clang' }
           - { build: 'cmake'    , arch: 'arm64', compiler: 'clang' }
       fail-fast: false
@@ -175,7 +175,7 @@ jobs:
               time cmake -B bld -G Ninja \
                 -DCMAKE_INSTALL_PREFIX="$HOME"/curl-install \
                 -DCMAKE_C_COMPILER="${CC}" \
-                -DCMAKE_UNITY_BUILD=ON -DCURL_TEST_BUNDLES=ON \
+                -DCMAKE_UNITY_BUILD=ON \
                 -DCURL_WERROR=ON \
                 -DENABLE_DEBUG=ON -DCMAKE_BUILD_TYPE=Debug \
                 -DCURL_USE_OPENSSL=ON \
@@ -188,7 +188,7 @@ jobs:
                 options='--disable-manual --disable-docs'  # Slow with autotools, skip on emulated CPU
               fi
               mkdir bld && cd bld
-              time ../configure --enable-unity --enable-test-bundles --enable-debug --enable-warnings --enable-werror \
+              time ../configure --enable-unity --enable-debug --enable-warnings --enable-werror \
                 --prefix="$HOME"/curl-install \
                 --with-openssl \
                 --with-brotli --enable-ldap --enable-ldaps --with-libidn2 --with-libssh2 --with-nghttp2 --with-gssapi \
@@ -258,7 +258,7 @@ jobs:
             export CURL_CI=github
             time autoreconf -fi
             mkdir bld && cd bld
-            time ../configure --enable-unity --enable-test-bundles --enable-debug --enable-warnings --enable-werror \
+            time ../configure --enable-unity --enable-debug --enable-warnings --enable-werror \
               --prefix="$HOME"/curl-install \
               --with-openssl \
               --disable-dependency-tracking \
@@ -378,12 +378,12 @@ jobs:
             # https://cmake.org/cmake/help/latest/manual/cmake-toolchains.7.html#cross-compiling-for-ios-tvos-visionos-or-watchos
             [ -n "${MATRIX_GENERATOR}" ] && options="-G ${MATRIX_GENERATOR}"
             cmake -B bld -G Ninja -D_CURL_PREFILL=ON \
-              -DCMAKE_UNITY_BUILD=ON -DCURL_TEST_BUNDLES=ON -DCURL_WERROR=ON \
+              -DCMAKE_UNITY_BUILD=ON -DCURL_WERROR=ON \
               -DCMAKE_SYSTEM_NAME=iOS \
               -DUSE_APPLE_IDN=ON \
               ${MATRIX_GENERATE} ${options}
           else
-            mkdir bld && cd bld && ../configure --enable-unity --enable-test-bundles --enable-warnings --enable-werror \
+            mkdir bld && cd bld && ../configure --enable-unity --enable-warnings --enable-werror \
               --disable-dependency-tracking \
               CFLAGS="-isysroot $(xcrun --sdk iphoneos --show-sdk-path 2>/dev/null)" \
               --host=aarch64-apple-darwin \
@@ -469,12 +469,12 @@ jobs:
               -DANDROID_ABI=arm64-v8a \
               -DANDROID_PLATFORM="android-${MATRIX_PLATFORM}" \
               -DCMAKE_TOOLCHAIN_FILE="${ANDROID_NDK_HOME}/build/cmake/android.toolchain.cmake" -DCMAKE_WARN_DEPRECATED=OFF \
-              -DCMAKE_UNITY_BUILD=ON -DCURL_TEST_BUNDLES=ON \
+              -DCMAKE_UNITY_BUILD=ON \
               -DCURL_WERROR=ON \
               ${MATRIX_OPTIONS}
           else
             TOOLCHAIN="${ANDROID_NDK_HOME}/toolchains/llvm/prebuilt/linux-x86_64"
-            mkdir bld && cd bld && ../configure --disable-dependency-tracking --enable-unity --enable-test-bundles --enable-warnings --enable-werror \
+            mkdir bld && cd bld && ../configure --disable-dependency-tracking --enable-unity --enable-warnings --enable-werror \
               CC="$TOOLCHAIN/bin/aarch64-linux-android${MATRIX_PLATFORM}-clang" \
               AR="$TOOLCHAIN/bin/llvm-ar" \
               RANLIB="$TOOLCHAIN/bin/llvm-ranlib" \
@@ -569,7 +569,7 @@ jobs:
               -DCMAKE_SYSTEM_PROCESSOR=x86 \
               -DCMAKE_C_COMPILER_TARGET=i586-pc-msdosdjgpp \
               -DCMAKE_C_COMPILER="$HOME/djgpp/bin/i586-pc-msdosdjgpp-gcc" \
-              -DCMAKE_UNITY_BUILD=ON -DCURL_TEST_BUNDLES=ON \
+              -DCMAKE_UNITY_BUILD=ON \
               -DCURL_WERROR=ON \
               -DCURL_USE_LIBPSL=OFF \
               -DOPENSSL_INCLUDE_DIR="$HOME/djgpp/include" \
@@ -580,7 +580,7 @@ jobs:
               -DWATT_ROOT="$HOME/djgpp/net/watt"
           else
             autoreconf -fi
-            mkdir bld && cd bld && ../configure --disable-dependency-tracking --enable-unity --enable-test-bundles --enable-warnings --enable-werror \
+            mkdir bld && cd bld && ../configure --disable-dependency-tracking --enable-unity --enable-warnings --enable-werror \
               CC="$HOME/djgpp/bin/i586-pc-msdosdjgpp-gcc" \
               AR="$HOME/djgpp/bin/i586-pc-msdosdjgpp-ar" \
               RANLIB="$HOME/djgpp/bin/i586-pc-msdosdjgpp-ranlib" \