fix(terraform): Fix false Positive finding for CKV_GCP_73

[1azunna]

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Description

Updated the matching pattern for this rule.

Fixes #6214

New/Edited policies (Delete if not relevant)

• CKV_GCP_73

Description

This was reporting a false positive due to the change in expression pattern

Fix

How does someone fix the issue in code and/or in runtime?

Checklist:

• [ ] My code follows the style guidelines of this project
• [ ] 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
• [ ] Any dependent changes have been merged and published in downstream modules