Allow triggering nightly build from PR label (#1271)

* Allow triggering nightly build from PR label

Adding the `full-test-run` label to a PR before creating it will trigger
the same workflow as the nightly job. Pushing up another commit after
adding the label will also switch to running the full test run.

Author: plemarquand

.github/workflows/pull_request.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   tests:
-    name: Test
+    name: ${{ contains(github.event.pull_request.labels.*.name, 'full-test-run') && 'Full Test Run' || 'Test'}}
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
     with:
       # Linux
@@ -17,15 +17,15 @@ jobs:
         NVM_DIR=/usr/local/nvm
         CI=1
         VSCODE_TEST=1
-        FAST_TEST_RUN=1
+        FAST_TEST_RUN=${{ contains(github.event.pull_request.labels.*.name, 'full-test-run') && '0' || '1'}}
       linux_pre_build_command: . .github/workflows/scripts/setup-linux.sh
       linux_build_command: ./docker/test.sh
       # Windows
       windows_exclude_swift_versions: '[{"swift_version": "nightly-6.0"},{"swift_version": "nightly"}]'
       windows_env_vars: |
         CI=1
         VSCODE_TEST=1
-        FAST_TEST_RUN=1
+        FAST_TEST_RUN=${{ contains(github.event.pull_request.labels.*.name, 'full-test-run') && '0' || '1'}}
       windows_pre_build_command: .github\workflows\scripts\windows\install-nodejs.ps1
       windows_build_command: docker\test-windows.ps1
       enable_windows_docker: false