refactor(generated): regenerate crates with first-class convert module

[suzmue]

Convert.rs is now discoverable and is formatted.

[gemini-code-assist]

Code Review

This pull request refactors the generated code for multiple Google Cloud services (AI Platform, Apigee Connect, BigLake, CES, Data Catalog Lineage, Device Streaming, Dialogflow CX, Dialogflow v2, Discovery Engine, Gemini Data Analytics, Model Armor, Retail, Speech, Text-to-Speech, Vision AI, Logging, Maps Routes, Maps Routing, and Showcase). The changes primarily involve moving the convert.rs module inclusion from prost/includes.rs to the main lib.rs file, wrapped in appropriate feature gates where necessary, and improving the formatting of generated code (e.g., better line breaks in ToProto and FromProto implementations). No functional logic changes were identified.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.95%. Comparing base (cf0f036) to head (fb541d8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6747   +/-   ##
=======================================
  Coverage   96.94%   96.95%           
=======================================
  Files         316      316           
  Lines      105211   105211           
=======================================
+ Hits       101999   102005    +6     
+ Misses       3212     3206    -6     

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