Fix gradle java version requirement warning

[jack-berg]

The existing warning is wrong (says java 11 is required to build instead of java 17) and is in the wrong place (gradle fails with compatibility exception when building buildSrc before the build.gradle.kts has a chance to run).

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (b0c5c04) 91.32% compared to head (8f7da88) 91.32%.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #5624   +/-   ##
=========================================
  Coverage     91.32%   91.32%           
  Complexity     4979     4979           
=========================================
  Files           554      554           
  Lines         14731    14731           
  Branches       1376     1376           
=========================================
  Hits          13453    13453           
  Misses          884      884           
  Partials        394      394           

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