chore: update googleapis SHA circa 20260825

[scotthart]

No description provided.

[gemini-code-assist]

Code Review

This pull request updates the googleapis dependency to a newer commit and regenerates the SDK clients. Key changes include updating Doxygen reference links, adding IAM permission documentation to BigQuery control clients, and implementing new RPCs: UpdateReservationGroup in the BigQuery Reservation service, CompleteControlPlaneUpgrade in GKE Cluster Manager, and DisableRapidCache in Storage Control. There are no review comments to assess, and I have no feedback to provide.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.30%. Comparing base (82fcb08) to head (343aa8a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16390      +/-   ##
==========================================
- Coverage   92.30%   92.30%   -0.01%     
==========================================
  Files        2245     2245              
  Lines      211870   211870              
==========================================
- Hits       195568   195566       -2     
- Misses      16302    16304       +2     

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