chore(dialogflow/cx/v3)!: service breaking changes

[coryan]

Update the version because the service had a number of breaking changes, including moved and removed fields.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.94%. Comparing base (a4b377e) to head (a68e7fd).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4398      +/-   ##
==========================================
+ Coverage   94.93%   94.94%   +0.01%     
==========================================
  Files         191      191              
  Lines        7262     7262              
==========================================
+ Hits         6894     6895       +1     
+ Misses        368      367       -1     

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