Add support to parse multiple cores for setting CPU affinity (backport #208)

[mergify]

This PR adds a new method that helps to set multiple CPUs for affinity instead of only one and this will help in choosing couple of CPUs to run the controller_manager etc

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This is an automatic backport of pull request #208 done by Mergify.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.

Project coverage is 77.28%. Comparing base (6252044) to head (0766602).

Files with missing lines	Patch %	Lines
src/realtime_helpers.cpp	94.73%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           humble     #223      +/-   ##
==========================================
+ Coverage   76.73%   77.28%   +0.54%     
==========================================
  Files           8        8              
  Lines         460      471      +11     
  Branches      175      179       +4     
==========================================
+ Hits          353      364      +11     
  Misses         70       70              
  Partials       37       37              

Flag	Coverage Δ
unittests	77.28% <94.73%> (+0.54%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/realtime_helpers.cpp	47.42% <94.73%> (+6.72%)	⬆️