feat: support gcs

[jim3ma]

Description

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Attention: Patch coverage is 37.67123% with 91 lines in your changes missing coverage. Please review.

Project coverage is 35.13%. Comparing base (cc4abed) to head (a92bcb9).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...kg/source/clients/gcsprotocol/gcs_source_client.go	37.67%	80 Missing and 11 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3746      +/-   ##
==========================================
- Coverage   35.21%   35.13%   -0.09%     
==========================================
  Files         336      337       +1     
  Lines       37852    37998     +146     
==========================================
+ Hits        13330    13350      +20     
- Misses      23697    23805     +108     
- Partials      825      843      +18     

Flag	Coverage Δ
unittests	35.13% <37.67%> (-0.09%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
pkg/source/source_client_builder.go	0.00% <ø> (ø)
...kg/source/clients/gcsprotocol/gcs_source_client.go	37.67% <37.67%> (ø)

... and 6 files with indirect coverage changes