chore: adding more test coverage to the Gcp crate

[rtyler]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 95.45455% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.17%. Comparing base (d7feb8f) to head (cb55638).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/gcp/src/config.rs	94.11%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3931      +/-   ##
==========================================
+ Coverage   74.00%   74.17%   +0.17%     
==========================================
  Files         152      152              
  Lines       39499    39530      +31     
  Branches    39499    39530      +31     
==========================================
+ Hits        29230    29323      +93     
+ Misses       8946     8881      -65     
- Partials     1323     1326       +3     

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