Switch to the new Gradle action in release.yml

[petertrr]

This should replace #107. Needs to be merged closer to the release to be able to ensure it works as expected.

Things to consider in the future: build all artifacts on a single MacOS machine.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.85%. Comparing base (5f3e6b3) to head (d38db71).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #110   +/-   ##
=========================================
  Coverage     85.85%   85.85%           
  Complexity      110      110           
=========================================
  Files            14       14           
  Lines           502      502           
  Branches         89       89           
=========================================
  Hits            431      431           
  Misses           47       47           
  Partials         24       24           

Flag	Coverage Δ
unittests	85.85% <ø> (ø)

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