feat: add junit XML export to airbyte-cdk connector test command

- Add --junitxml argument to pytest command to export results to <connector_dir>/build/standard-tests-junit.xml
- Create build directory if it doesn't exist
- Maintains existing functionality while adding test result export capability

Co-Authored-By: AJ Steers <[email protected]>

Author: devin-ai-integration[bot]

airbyte_cdk/cli/airbyte_cdk/_connector.py

@@ -162,6 +162,13 @@ def test(
         pytest_args.append("--collect-only")
 
     pytest_args.append(str(test_file_path))
+
+    if connector_directory:
+        build_dir = connector_directory / "build"
+        build_dir.mkdir(parents=True, exist_ok=True)
+        junit_xml_path = build_dir / "standard-tests-junit.xml"
+        pytest_args.extend(["--junitxml", str(junit_xml_path)])
+
     click.echo(f"Running tests from connector directory: {connector_directory}...")
     click.echo(f"Test file: {test_file_path}")
     click.echo(f"Collect only: {collect_only}")