Update to Error Prone 2.32.0

[msridhar]

Error Prone 2.32.0 requires JDK 17 or higher. We tweak our CI config accordingly, adding a job testing on the last EP version (2.31.0) that worked with JDK 11. (We should really tweak our Gradle config to completely divorce the JDK version used to run Gradle from the JDK version for the test tasks, but that'll have to wait for a PR.)

A few changes to our required job names will be required before this can land.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.23%. Comparing base (66225fd) to head (d69eae3).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1037   +/-   ##
=========================================
  Coverage     87.23%   87.23%           
  Complexity     2129     2129           
=========================================
  Files            83       83           
  Lines          6965     6965           
  Branches       1356     1356           
=========================================
  Hits           6076     6076           
  Misses          458      458           
  Partials        431      431           

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