GHA: align all install, configure and build steps again

First step towards more unified build steps on GitHub Actions.

Closes #8873

.github/workflows/macos.yml

@@ -89,8 +89,11 @@ jobs:
 
     - uses: actions/checkout@v3
 
-    - run: autoreconf -fi && ./configure --enable-warnings --enable-werror --enable-headers-api ${{ matrix.build.configure }}
-      name: 'configure and build'
+    - run: autoreconf -fi
+      name: 'autoreconf'
+
+    - run: ./configure --enable-warnings --enable-werror ${{ matrix.build.configure }} --enable-headers-api
+      name: 'configure'
       env:
         # -Wvla is caused by brotli
         CFLAGS: "-Wno-vla -mmacosx-version-min=${{ matrix.build.macosx-version-min }}"
@@ -98,6 +101,9 @@ jobs:
     - run: make V=1
       name: 'make'
 
+    - run: make V=1 examples
+      name: 'make examples'
+
     - run: make V=1 test-ci
       name: 'test'
       env: