[backport] add encodingProcess and numColorComponents SOF members

[enen92]

Backport of #2874 and an alternative to #2887 due to the merge conflicts

[ghost]

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[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (72129e7) 63.99% compared to head (1b257f6) 64.00%.
Report is 19 commits behind head on 0.28.x.

Files	Patch %	Lines
src/rafimage.cpp	0.00%	6 Missing ⚠️
src/canonmn_int.cpp	83.33%	1 Missing and 1 partial ⚠️
src/datasets.cpp	66.66%	0 Missing and 1 partial ⚠️
src/jpgimage.cpp	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           0.28.x    #2888   +/-   ##
=======================================
  Coverage   63.99%   64.00%           
=======================================
  Files         103      104    +1     
  Lines       22338    22360   +22     
  Branches    10821    10833   +12     
=======================================
+ Hits        14296    14311   +15     
- Misses       5818     5823    +5     
- Partials     2224     2226    +2     

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