[wip] remove usage

[derrickaw]

1. Remove gsutil usage throughout the repo
2. Replace with gcloud storage where appropriate
3. Add PreCommit workflow to ensure no new code gets committed with gsutil usage

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (master@aaad9b4). Learn more about missing BASE report.
⚠️ Report is 14 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #39448   +/-   ##
=========================================
  Coverage          ?   58.06%           
  Complexity        ?    13072           
=========================================
  Files             ?     2520           
  Lines             ?   263872           
  Branches          ?    10769           
=========================================
  Hits              ?   153223           
  Misses            ?   104897           
  Partials          ?     5752           

Flag	Coverage Δ
java	64.25% <ø> (?)

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[derrickaw]

/gemini review

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Caution

The consumer version of Gemini Code Assist on GitHub has been sunset. All code review activity has officially ceased.