workflows: fix validate CRD by fetching all git repo history

Also add a trigger on the workflow file to test.

Signed-off-by: Mahe Tardy <[email protected]>

.github/workflows/validate-crd.yaml

@@ -5,21 +5,24 @@ on:
     paths:
       - 'pkg/k8s/apis/cilium.io/client/crds/v1alpha1/*.yaml'
       - 'pkg/k8s/apis/cilium.io/v1alpha1/version.go'
+      - '.github/workflows/validate-crd.yaml'
 
 jobs:
   check-version:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        with:
+          fetch-depth: 0
 
       - name: Check for CRD changes and version update
         run: |
           crd_changed=0
           version_changed=0
 
           # Check for CRD changes
-          crd_changes=$(git diff --name-only ${{ github.base_ref }} ${{ github.head_ref }} -- pkg/k8s/apis/cilium.io/client/crds/v1alpha1/*.yaml)
+          crd_changes=$(git diff --name-only origin/${{ github.base_ref }} ${{ github.head_ref }} -- pkg/k8s/apis/cilium.io/client/crds/v1alpha1/*.yaml)
           if [ -n "$crd_changes" ]; then
             crd_changed=1
           fi
@@ -44,4 +47,4 @@ jobs:
           if [ "$crd_changed" -eq 0 ] && [ "$version_changed" -eq 1 ]; then
             echo "CustomResourceDefinitionSchemaVersion in pkg/k8s/apis/cilium.io/v1alpha1/version.go to be updated only in case of modifying the files pkg/k8s/apis/cilium.io/client/crds/v1alpha1/*.yaml"
             exit 1
-          fi
+          fi