Upgrade to Gradle 7

[chao2zhang]

This is to prepare for #3688

[3flex]

Are you working on the build failures?

I don't mind doing it but I don't want to duplicate effort.

[chao2zhang]

Thanks for offering the help. I am attempting to fix this in #3691

[codecov]

Codecov Report

Merging #3689 (9007e8e) into main (9babc59) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #3689   +/-   ##
=========================================
  Coverage     78.00%   78.00%           
  Complexity     2870     2870           
=========================================
  Files           471      471           
  Lines          9275     9275           
  Branches       1766     1766           
=========================================
  Hits           7235     7235           
  Misses         1078     1078           
  Partials        962      962           

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[3flex]

Tests are flaky... is that a known issue with the detekt build? I had to rerun the checks twice before everything came up green.

[chao2zhang]

is that a known issue with the detekt build?

I have been noticing that lately as well. Since we are seeing out-of-memory issues, the first thing I would like to try is to bump Gradle JVM heap sizes.