Fixes a regression in the AWS intialization script for Dev and Test venue

[tloubrieu-jpl]

🗒️ Summary

The option --terrgrunt was not supported anymore.

🤖 AI Assistance Disclosure

• No AI assistance used
• AI used for light assistance (e.g., suggestions, refactoring, documentation help, minor edits)
• AI used for moderate content generation (AI generated some code or logic, but the developer authored or heavily revised the majority)
• AI generated substantial portions of this code

Estimated % of code influenced by AI: _100 %

⚙️ Test Data and/or Report

Tested the full deployment with integration test in the dev venue.

♻️ Related Issues

Necessary for the deployment in test #542

🤓 Reviewer Checklist

Reviewers: Please verify the following before approving this pull request.

Documentation and PR Content

• Documentation: README, Wiki, or inline documentation (Sphinx, Javadoc, Docstrings) have been updated to reflect these changes.
• Issue Traceability: The PR is linked to a valid GitHub Issue
• PR Title: The PR title is "user-friendly" clearly identifying what is being fixed or the new feature being added, that if you saw it in the Release Notes for a tool, you would be able to get the gist of what was done.

Security & Quality

• SonarCloud: Confirmed no new High or Critical security findings.
• Secrets Detection: Verified that the Secrets Detection scan passed and no sensitive information (keys, tokens, PII) is exposed.
• Code Quality: Code follows organization style guidelines and best practices for the specific language (e.g., PEP 8, Google Java Style).

Testing & Validation

• Test Accuracy: Verified that test data is accurate, representative of real-world PDS4 scenarios, and sufficient for the logic being tested.
• Coverage: Automated tests cover new logic and edge cases.
• Local Verification: (If applicable) Successfully built and ran the changes in a local or staging environment.

Maintenance

• Backward Compatibility: Confirmed that these changes do not break existing downstream dependencies or API contracts (or that breaking changes are clearly documented).

[nutjob4life]

In general diagnostic messages should go to the standard error:

print(
    f"Error: Terraform directory not found or missing {marker}: {tf_dir}",
    file=sys.stderr
)

[nutjob4life]

Code delta: ✓
One concern: not using sys.stderr
Is it minor? ✓
Approval: ✅
Caveat: review based on visual inspection only; trust accordingly