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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Description

Fixes a bug where --external-modules-download-path is ignored.

Fixes #6675

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my feature, policy, or fix is effective and works
• New and existing tests pass locally with my changes

Generated description

Below is a concise technical summary of the changes proposed in this PR:

Fixes the bug where the --external-modules-download-path flag was ignored in the RunnerRegistry class. Updates the get_enriched_resources method to include the external_modules_download_path parameter, ensuring external modules are downloaded to the specified path. Adds corresponding test cases in test_runner_registry_plan_enrichment.py to verify the functionality.