Fix scan and tests about new CI/CD and new test cases

[ozkanuysal]

This pull request introduces significant enhancements to cloud integration workflows, CI pipelines, and testing frameworks, with a particular focus on cloud plugin compatibility, security, and S3 functionality. Key changes include the addition of detailed integration tests for various cloud providers, expanded CI capabilities for security and performance, and new test cases for S3 operations.

Cloud Integration Enhancements:

• Added a new GitHub Actions workflow (.github/workflows/cloud-integration.yml) to run integration tests for AWS, Azure, GCP, and Kubernetes plugins. Includes plugin-specific dependency installation, compatibility tests, and mock service testing for AWS using Moto.
• Introduced a plugin compatibility matrix to test each cloud plugin across Python versions 3.8, 3.11, and 3.13.

CI Pipeline Improvements:

• Created an enhanced CI pipeline (.github/workflows/enhanced-ci.yml) with jobs for security scanning (Safety, Bandit, Semgrep), dependency review, Python compatibility across versions 3.8 to 3.13, performance benchmarks, code quality checks (Black, Isort, Flake8, Mypy), Docker integration tests, and documentation validation.
• Extended Python version support in the metaflow.s3_tests.minio.yml workflow to include Python 3.13.

S3 Testing Enhancements:

• Added comprehensive test cases in test/data/s3/test_s3_enhanced.py for S3 operations, including concurrent and async operations, error handling, retry mechanisms, large file handling, metadata preservation, multi-region support, performance monitoring, and connection pooling.
• Introduced security-related tests for S3 credentials validation and URL safety to prevent unauthorized access or injection attacks.

Miscellaneous Improvements:

• Increased the wait time for MinIO startup in the metaflow.s3_tests.minio.yml workflow and added a readiness check for MinIO's health endpoint.