ci: build artifacts in parallel and add arm64 to release

[pmalek]

This PR:

• drops the usage of unsupported actions/create-release in favor of softprops/action-gh-release
• makes the release building process run in parallel for specified platforms
• add arm64 binaries for linux and darwin 🎉
• runs tests in release-testing pipeline in parallel

Which issues does this PR fix

Fixes #458

Special notes for reviewers

Exemplar release CI pipeline: https://github.com/Kong/kubernetes-testing-framework/actions/runs/4062926901

[codecov-commenter]

Codecov Report

Base: 6.87% // Head: 6.87% // No change to project coverage 👍

Coverage data is based on head (100a1e3) compared to base (1910a76).
Patch has no changes to coverable lines.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #518   +/-   ##
=====================================
  Coverage   6.87%   6.87%           
=====================================
  Files         11      11           
  Lines       1716    1716           
=====================================
  Hits         118     118           
  Misses      1592    1592           
  Partials       6       6           

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