Print host CPU and installed package info in CI build log on Linux

On one of the nightly CI builds last week, there were test failures in
mbstring which appear like they might be related to SIMD-accelerated
code. The function which failed testing has multiple implementations,
and the specific implementation which is used depends on the features of
the host CPU and the build configuration.

The CI build log does not offer any clues about what implementation
was actually used when the tests failed. If the same thing happens
again, it will be helpful to (at least) know what CPU features the host
CPU supports. This will also be helpful when diagnosing any other CI
build failures which relate to CPU-specific code (or those which
related to external packages such as ICU).

It would be better to print even more information about the build
configuration. It would also be better to print host CPU information
on Windows CI builds as well.

.github/workflows/nightly.yml

@@ -72,6 +72,14 @@ jobs:
         uses: ./.github/actions/setup-oracle
       - name: apt
         uses: ./.github/actions/apt-x64
+      - name: System info
+        run: |
+          echo "::group::Show host CPU info"
+          lscpu
+          echo "::endgroup::"
+          echo "::group::Show installed package versions"
+          dpkg -l
+          echo "::endgroup::"
       - name: ./configure
         uses: ./.github/actions/configure-x64
         with:
@@ -160,6 +168,14 @@ jobs:
           ref: ${{ matrix.branch.ref }}
       - name: apt
         uses: ./.github/actions/apt-x32
+      - name: System info
+        run: |
+          echo "::group::Show host CPU info"
+          lscpu
+          echo "::endgroup::"
+          echo "::group::Show installed package versions"
+          dpkg -l
+          echo "::endgroup::"
       - name: ./configure
         uses: ./.github/actions/configure-x32
         with:

.github/workflows/push.yml

@@ -71,6 +71,14 @@ jobs:
         uses: actions/checkout@v3
       - name: apt
         uses: ./.github/actions/apt-x64
+      - name: System info
+        run: |
+          echo "::group::Show host CPU info"
+          lscpu
+          echo "::endgroup::"
+          echo "::group::Show installed package versions"
+          dpkg -l
+          echo "::endgroup::"
       - name: Create MSSQL container
         if: ${{ !matrix.asan }}
         uses: ./.github/actions/setup-mssql