fix: Modules of nested source not generating correctly

[Maed223]

Related issue

Fixes #3026

Description

"terraformModules": [
    "terraform-aws-modules/vpc/aws@5.0.0",
    "terraform-aws-modules/rds/aws@5.0.0"
  ],

Currently module source listed as above do not generate correctly in C#, Java, or Python.

Checklist

• I have updated the PR title to match CDKTF's style guide
• I have run the linter on my code locally
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation if applicable
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works if applicable
• New and existing unit tests pass locally with my changes

[github-actions]

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