CI: add test timeouts, more cmake build tests, fix VS2010 C warning

- GHA/macos: set timeout for test runs.
  Double the value for autotools to fit torture tests.
- GHA/cygwin: reduce test run timeout for autotools.
- GHA/cygwin: enable building tests with cmake.
- GHA/windows: enable building tests with MSYS cmake.
- GHA/windows: enable building tests with MSVC UWP.
- appveyor: enable building tests with VS2008 x86 and VS2010 x64.
- tests: add workaround compiler warnings when building with VS2010:
  ```
  tests\server\util.c(482): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
  tests\server\util.c(486): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
  tests\server\util.c(490): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
  tests\server\util.c(720): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
  tests\server\util.c(726): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
  tests\server\util.c(732): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
  tests\server\util.c(781): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
  tests\server\util.c(785): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
  tests\server\util.c(789): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
  ```
  Ref: https://ci.appveyor.com/project/curlorg/curl/builds/50485633/job/4ujlwxod3cexmn2q#L1535

With this, tests are built in all GHA cygwin/windows jobs.

Timeouts avoid long runs with runaway issues, example:
https://github.com/curl/curl/actions/runs/10575522173

Closes #14700

.github/workflows/macos.yml

@@ -253,6 +253,7 @@ jobs:
         run: make -C bld V=1 -C tests
 
       - name: 'run tests'
+        timeout-minutes: 20
         run: |
           export TFLAGS='${{ matrix.tflags }} -j10'
           TFLAGS+=' ~2037 ~2041'  # flaky
@@ -385,6 +386,7 @@ jobs:
         run: make -C bld testdeps
 
       - name: 'cmake run tests'
+        timeout-minutes: 10
         run: |
           export TFLAGS='${{ matrix.build.tflags }} -j10'
           TFLAGS+=' ~2037 ~2041'  # flaky