Fixes Invoke-Parallel not disposing Runspaces, take 2

[santisq]

This PR fixes the issue where the cmdlet would not be correctly disposing runspaces in scenarios where a PipelineStoppedException was thrown (CTRL+C / Select-Object -First) and OperationCanceledException (Timeout reached).

[codecov]

Codecov Report

Attention: Patch coverage is 94.44444% with 3 lines in your changes missing coverage. Please review.

Project coverage is 93.40%. Comparing base (50270fb) to head (13ca3e5).

Files	Patch %	Lines
...ParallelPipeline/Commands/InvokeParallelCommand.cs	60.00%	2 Missing ⚠️
src/PSParallelPipeline/Worker.cs	88.88%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #38      +/-   ##
==========================================
+ Coverage   91.79%   93.40%   +1.61%     
==========================================
  Files          10       11       +1     
  Lines         536      546      +10     
  Branches       39       39              
==========================================
+ Hits          492      510      +18     
+ Misses         35       28       -7     
+ Partials        9        8       -1     

Flag	Coverage Δ
PS-5.1	93.61% <94.44%> (+5.09%)	⬆️
PS-7_Linux	93.40% <94.44%> (+1.61%)	⬆️
PS-7_Windows	93.61% <94.44%> (+1.94%)	⬆️

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