gha: Test split out runtimeclasses are in sync with all-in-one file

This is needed in order to not lose track of what's been created and
what's been added here and there.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

.github/workflows/kata-runtime-classes-sync.yaml

@@ -0,0 +1,36 @@
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - reopened
+      - synchronize
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  kata-deploy-runtime-classes-check:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+    - name: Ensure the split out runtime classes match the all-in-one file
+      run: |
+        pushd tools/packaging/kata-deploy/runtimeclasses/
+        echo "::group::Combine runtime classes"
+        for runtimeClass in `find . -type f \( -name "*.yaml" -and -not -name "kata-runtimeClasses.yaml" \) | sort`; do
+            echo "Adding ${runtimeClass} to the resultingRuntimeClasses.yaml"
+            cat ${runtimeClass} >> resultingRuntimeClasses.yaml;
+        done
+        echo "::endgroup::"
+        echo "::group::Displaying the content of resultingRuntimeClasses.yaml"
+        cat resultingRuntimeClasses.yaml
+        echo "::endgroup::"
+        echo ""
+        echo "::group::Displaying the content of kata-runtimeClasses.yaml"
+        cat kata-runtimeClasses.yaml
+        echo "::endgroup::"
+        echo ""
+        diff resultingRuntimeClasses.yaml kata-runtimeClasses.yaml