Add API for specifying thread stack size

[jdelapla]

Issue #, if available:

What was changed?
Added API to support specifying stack size of threads at time of creation.
Added an ability to specify default stack sizes at compile time.

Why was it changed?
Libraries that use this asset as a dependency needed to be able to customize their thread stack sizes

How was it changed?
New API added, check for default compile time variable.

What testing was done for the changes?
Old tests passing, new tests added. Additional changes made in upstream libraries using this change that also have tests passing.

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 70.58824% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 80.30%. Comparing base (2b835f3) to head (8c447bd).
Report is 9 commits behind head on develop.

❗ Current head 8c447bd differs from pull request most recent head cb8154c. Consider uploading reports for the commit cb8154c to get more accurate results

Files	Patch %	Lines
src/utils/src/FileIo.c	40.00%	3 Missing ⚠️
src/utils/src/Thread.c	83.33%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #243      +/-   ##
===========================================
- Coverage    80.34%   80.30%   -0.05%     
===========================================
  Files           53       53              
  Lines        10808    10826      +18     
===========================================
+ Hits          8684     8694      +10     
- Misses        2124     2132       +8     

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[hassanctech]

The Windows CI tests weren't running at all the WebRTC C SDK PR due to an unrelated issue (couldn't find ZLIB so the build didn't finish) so we weren't able to see if this works there. I pushed a commit to that branch and ran the CI and it's all good on Windows except for some file caching tests which have been resolved in another PR, so I'm now approving this PR.