Update-integration-tests-worflow (#291)

## Description of change
This PR modifies the GitHub Actions workflow to run integration tests
automatically after PR merge, removing the manual approval requirement
for post-merge cases.
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#### Does this contribution introduce any breaking changes to the
existing APIs or behaviors?
No

#### Does this contribution introduce any new public APIs or behaviors?
No

#### Does this contribution need a changelog entry?
No

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Author: vaibhav5140

.github/workflows/gradle-integration-test.yml

@@ -26,7 +26,7 @@ jobs:
   build:
     name: Integration Tests
     runs-on: codebuild-s3-analytics-accelerator-eu-west-1-${{ github.run_id }}-${{ github.run_attempt }}
-    environment: integration-tests
+    environment: ${{ github.event_name == 'pull_request_target' && 'integration-tests' || '' }}
     permissions:
       contents: read
       id-token: write