[aghassemlouei]

Description

• Flatten tests/gem4gov_cli/, tests/tools/, and tests/scripts/ directly into tests/ while preserving Git rename history across all 17 relocated test files (including tests/test_lint_sh.py), and remove redundant tests/conftest.py, tests/gem4gov_cli/__init__.py, tests/tools/__init__.py, and tests/scripts/run_shell_tests.sh wrappers.
• Expand single-scenario unit tests with concrete argument and output assertions across test_auth.py, test_data_stores.py, test_state_iam.py, test_tfdoc.py, test_check_boilerplate.py, and test_common_functions.sh.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Deployment & Compliance Impact

• Applicable Regimes:
  • US Region Restricted (e.g., Access Policy constraint)
  • FedRAMP Moderate
  • FedRAMP High
  • DoD IL4
  • DoD IL5
  • General / All
• NIST 800-53r5 Controls: SA-11, CM-2

Checklist

Code Quality & Reusability

• My code adheres to the Maximize Reusability principle. I have not redefined common elements and have reused existing base configurations and modules where possible.
• I have checked that no existing module or configuration in modules/ or fast/stages-aw/ can be leveraged for this change.
• My code follows the established naming conventions outlined in docs/naming-convention.md.

Documentation

• I have updated the README.md of the modified module or blueprint.
• I have added/updated documentation for inputs (variables) and outputs.

Security

• My change adheres to GCP security best practices and the principle of least privilege.
• I have ensured compliance with the targeted regime (FedRAMP Moderate, FedRAMP High, IL4, IL5, etc.).

Testing

• I have tested my changes locally.
• I have included details of my testing in this PR.

Testing Performed

• Executed bash tools/run_tests.sh (103 Python unit tests, 28 shell syntax checks, 90 shell unit tests, and CodeQL AST checks pass) and python3 tools/check_boilerplate.py tests tools.