PROCFS_ONLY collection method

[JoukoVirtanen]

Description

Just a quick and dirty implementation for hackathon. Not meant to actually be good.

Checklist

• Investigated and inspected CI test results
• Updated documentation accordingly

Automated testing

• Added unit tests
• Added integration tests
• Added regression tests

If any of these don't apply, please comment below.

Testing Performed

TODO(replace-me)
Use this space to explain how you tested your PR, or, if you didn't test it, why you did not do so. (Valid reasons include "CI is sufficient" or "No testable changes")
In addition to reviewing your code, reviewers must also review your testing instructions, and make sure they are sufficient.

For more details, ref the Confluence page about this section.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 14 lines in your changes missing coverage. Please review.

Please upload report for BASE (master@f3b8b35). Learn more about missing BASE report.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
collector/lib/CollectorService.cpp	0.00%	10 Missing ⚠️
collector/lib/CollectionMethod.cpp	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #2051   +/-   ##
=========================================
  Coverage          ?   26.48%           
=========================================
  Files             ?       89           
  Lines             ?     5419           
  Branches          ?     2382           
=========================================
  Hits              ?     1435           
  Misses            ?     3429           
  Partials          ?      555           

Flag	Coverage Δ
collector-unit-tests	26.48% <0.00%> (?)

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