feat: add gcp token-based auth support

[alex766]

Allow support of connecting to GCP with storage tokens instead of service key JSON or serialized key using object_store's with_credentials.

Tested and created dataset in GCP:

through notebook:

[github-actions]

ACTION NEEDED
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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 63.63636% with 4 lines in your changes missing coverage. Please review.

Project coverage is 78.66%. Comparing base (949c6e7) to head (b733219).
Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
rust/lance-io/src/object_store.rs	63.63%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3511      +/-   ##
==========================================
+ Coverage   78.46%   78.66%   +0.20%     
==========================================
  Files         252      254       +2     
  Lines       93917    94999    +1082     
  Branches    93917    94999    +1082     
==========================================
+ Hits        73692    74731    +1039     
- Misses      17230    17249      +19     
- Partials     2995     3019      +24     

Flag	Coverage Δ
unittests	78.66% <63.63%> (+0.20%)	⬆️

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