Skip plus tests on a fork

Problem: The NGINX Plus JWT is only available on the upstream repo, so automated tests for Plus can't be run on forks.

Solution: Skip these test runs on a fork.

Author: sjberman

.github/workflows/conformance.yml

@@ -23,6 +23,7 @@ permissions:
 jobs:
   conformance-tests:
     name: Run Tests
+    if: ${{ !(github.event.repository.fork == true && inputs.image == 'plus') }}
     runs-on: ubuntu-24.04
     permissions:
       contents: write # needed for uploading release artifacts

.github/workflows/functional.yml

@@ -20,6 +20,7 @@ permissions:
 jobs:
   functional-tests:
     name: Run Tests
+    if: ${{ !(github.event.repository.fork == true && inputs.image == 'plus') }}
     runs-on: ubuntu-24.04
     env:
       DOCKER_BUILD_SUMMARY: false

.github/workflows/helm.yml

@@ -17,7 +17,7 @@ jobs:
   helm-tests-local:
     name: Helm Tests Local
     runs-on: ubuntu-24.04
-    if: ${{ github.event_name != 'schedule' }}
+    if: ${{ github.event_name != 'schedule' && !(github.event.repository.fork == true && inputs.image == 'plus') }}
     steps:
       - name: Checkout Repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2