Add ability to share github action validation

.github/workflows/validate-gh-action.yml

@@ -0,0 +1,26 @@
+name: Validate Github Actions
+
+on:
+  workflow_call: {}
+
+# cancel in-progress runs of the same workflow
+# to avoid unnecessary runs when multiple commits pushed
+# in a short period of time
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      with:
+        persist-credentials: false
+
+    - name: Run actionlint to lint our github action
+      uses: raven-actions/actionlint@205b530c5d9fa8f44ae9ed59f341a0db994aa6f8 # v2.1.2
+
+    - name: Run zizmor 🌈
+      uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2

.github/workflows/validate.yml

@@ -1,4 +1,4 @@
-name: Validate GitHub Actions Workflows
+name: Validate GitHub Actions Workflows for this shared actions repo
 permissions: {}
 
 on:
@@ -7,16 +7,6 @@ on:
       - '.github/workflows/*.yml'
 
 jobs:
-  validate:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
-        with:
-          persist-credentials: false
-
-      - name: Run actionlint to lint our github action
-        uses: raven-actions/actionlint@205b530c5d9fa8f44ae9ed59f341a0db994aa6f8 # v2.1.2
 
-      - name: Run zizmor 🌈
-        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2
+  validate:
+    uses: ./.github/workflows/validate-gh-action.yml