Fix LocalStack availability for retried PR test jobs

- Add condition to restart LocalStack on job retries (github.run_attempt > 1)
- Ensures CA bundle tests and other LocalStack-dependent tests have access to running LocalStack instance
- Maintains existing label check behavior for first run
- Fixes issue where retrying failed test jobs would fail due to missing LocalStack

Author: the-mann

.github/workflows/PR-test.yml

@@ -97,7 +97,7 @@ jobs:
   StartLocalStack:
     name: 'StartLocalStack'
     needs: [ CheckLabel, OutputEnvVariables ]
-    if: needs.CheckLabel.outputs.should_run == 'true'
+    if: needs.CheckLabel.outputs.should_run == 'true' || github.run_attempt > 1
     uses: ./.github/workflows/start-localstack.yml
     secrets: inherit
     permissions: