test: run "on cluster RT" tests in parallel

[matejvasek]

Changes

• Run on cluster RT tests in parallel.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e7c9695) 59.10% compared to head (4672d39) 62.74%.
Report is 88 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1991      +/-   ##
==========================================
+ Coverage   59.10%   62.74%   +3.64%     
==========================================
  Files         106      106              
  Lines       13693    13693              
==========================================
+ Hits         8093     8592     +499     
+ Misses       4783     4232     -551     
- Partials      817      869      +52     

Flag	Coverage Δ
e2e-test	36.46% <ø> (?)
e2e-test-oncluster	30.42% <ø> (-0.09%)	⬇️
e2e-test-oncluster-runtime	26.79% <ø> (?)
e2e-test-runtime-go	25.50% <ø> (?)
e2e-test-runtime-node	26.60% <ø> (?)
e2e-test-runtime-python	26.60% <ø> (?)
e2e-test-runtime-quarkus	26.71% <ø> (?)
e2e-test-runtime-rust	25.59% <ø> (?)
e2e-test-runtime-springboot	25.73% <ø> (?)
e2e-test-runtime-typescript	26.71% <ø> (?)
integration-tests	51.43% <ø> (+2.11%)	⬆️
unit-tests-macos-latest	48.21% <ø> (ø)
unit-tests-ubuntu-latest	48.98% <ø> (-0.03%)	⬇️
unit-tests-windows-latest	48.23% <ø> (-0.02%)	⬇️

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[jrangelramos]

Hmm.. It took 34m to run in parallel.
On my previous PR it took 33m (not in paralell).
Maybe GH is just busy and it shall run faster some other PR or other moment..

The only caveat i the fact that s it mixes test log output which may turn a bit difficult to troubleshoot whenever something fails.. but I'm ok with that as long as it speed up tests.

[matejvasek]

@jrangelramos if tests use t.Log(), not raw output, then output is not really mixed, well maybe a little but in a way that can be demuxed. For instance if you run test in IDE it will split it for you.

This improves speed at least when testing locally. On GH not so much. For me it cut down 4 mins, but the variance is to high to tell.

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PR needs rebase.

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