[reuvenlax]

Use BeamParallelJunit4Runner for regular tests (previously it was used for ValidatesRunner tests only). Fixes a few classes that were not safe for parallel execution, and excludes remaining unsafe tests from parallel execution.

[codecov]

Codecov Report

❌ Patch coverage is 73.46939% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.62%. Comparing base (020707d) to head (dc3c705).
⚠️ Report is 16 commits behind head on master.

Files with missing lines	Patch %	Lines
...che/beam/sdk/testing/BeamParallelJunit4Runner.java	73.46%	15 Missing and 11 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #40324      +/-   ##
============================================
+ Coverage     56.15%   58.62%   +2.46%     
- Complexity     2290    13827   +11537     
============================================
  Files          1121     2580    +1459     
  Lines        177169   270333   +93164     
  Branches       1488    11214    +9726     
============================================
+ Hits          99489   158471   +58982     
- Misses        75158   105817   +30659     
- Partials       2522     6045    +3523     

Flag	Coverage Δ
java	64.98% <73.46%> (-10.77%)	⬇️

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[github-actions]

Assigning reviewers:

R: @kennknowles for label java.
R: @Amar3tto for label build.
R: @Abacn for label website.

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