Add pr-ci-triggers workflow

Added the pr-ci-triggers github workflow to print out available
vendors CIs trigger phrases.

.github/workflows/pr-ci-triggers.yml

@@ -0,0 +1,31 @@
+on:
+  pull_request_target:
+
+jobs:
+  vendors-ci-triggers-list:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v5
+        env:
+          MESSAGE: >-
+            Thanks for your PR,
+            To run vendors CIs use one of:
+             * `/test-all`: To run all tests for all vendors.
+             * `/test-e2e-all`: To run all E2E tests for all vendors.
+             * `/test-e2e-nvidia-all`: To run all E2E tests for NVIDIA vendor.
+            
+            To skip the vendors CIs use one of:
+             * `/skip-all`: To skip all tests for all vendors.
+             * `/skip-e2e-all`: To skip all E2E tests for all vendors.
+             * `/skip-e2e-nvidia-all`: To skip all E2E tests for NVIDIA vendor.
+            Best regards.
+        with:
+          github-token: ${{secrets.GITHUB_TOKEN}}
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: "${{ env.MESSAGE }}"
+            })
+

ci/examples/jenkins/sriov-network-operator-ci.yaml

@@ -59,7 +59,7 @@
           failure-status: "Build Failed, comment `/test-e2e-all`, /test-e2e-nvidia-all, or `/test-all` to retrigger"
           error-status: "Build Failed, comment `/test-e2e-all`, /test-e2e-nvidia-all, or `/test-all` to retrigger"
           status-context: '{project} CI'
-          trigger-phrase: ".*/test-(all|e2e-all|e2e-nvidia-all(,| |$)).*"
+          trigger-phrase: "^(?!Thanks for your PR).*/test-(all|e2e-all|e2e-nvidia-all(,| |$)).*"
           white-list:
             - '*'
           white-list-target-branches: