ci: validate-crd

If there is a change in the crd yaml files and if CustomResourceDefinitionSchemaVersion value is not updated accordingly in pkg/k8s/apis/cilium.io/v1alpha1/register.go it will fail the ci

Signed-off-by: sadath-12 <sadathsadu2002@gmail.com>

.github/workflows/validate-crd.yaml

@@ -0,0 +1,52 @@
+name: Check CRD Version Update
+
+on:
+  pull_request:
+    paths:
+      - 'pkg/k8s/apis/cilium.io/client/crds/v1alpha1/*.yaml'
+
+jobs:
+  check-version:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: ${{ github.event_name == 'pull_request' && 2 || 0 }}
+
+      - name: Get all changed files
+        id: changed-files
+        uses: jitterbit/get-changed-files@v1
+
+      - name: Check for CRD changes and version update
+        run: |
+
+          crd_changed=0
+          version_changed=0
+          for changed_file in ${{ steps.changed-files.outputs.all }}; do
+            if echo "$changed_file" | grep -q 'pkg/k8s/apis/cilium.io/client/crds/v1alpha1/'; then
+              crd_changed=1
+            fi
+
+            if echo "$changed_file" | grep -q 'pkg/k8s/apis/cilium.io/v1alpha1/register.go'; then
+              old_version=$(git show ${{ github.event.pull_request.base.sha }}:pkg/k8s/apis/cilium.io/v1alpha1/register.go | grep 'CustomResourceDefinitionSchemaVersion' | awk -F'"' '{print $2}')
+              new_version=$(grep 'CustomResourceDefinitionSchemaVersion' $changed_file | awk -F'"' '{print $2}')
+              echo "old_version=$old_version"
+              echo "new_version=$new_version"
+              if [ "$old_version" != "$new_version" ]; then
+                version_changed=1
+              fi
+            fi
+          done
+
+          if [ "$crd_changed" -eq 1 ] && [ "$version_changed" -eq 0 ]; then
+            echo "CRD changed but version not updated"
+            exit 1
+          fi
+
+          if [ "$crd_changed" -eq 0 ] && [ "$version_changed" -eq 1 ]; then
+            echo "Version updated but CRD not changed"
+            exit 1
+          fi
+
+          echo "crd_changed=$crd_changed"
+          echo "version_changed=$version_changed"