adjust collection parameters parsing to better support OGC API Coverages

[fmigneault]

• Relates to fix OGC API coverages subset and datetime not forwarded geopython/OWSLib#967

[codecov]

Codecov Report

Attention: Patch coverage is 88.23529% with 4 lines in your changes missing coverage. Please review.

Project coverage is 87.72%. Comparing base (e0e195e) to head (c9f9c89).
Report is 15 commits behind head on master.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
weaver/processes/builtin/collection_processor.py	85.71%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #787      +/-   ##
==========================================
+ Coverage   87.68%   87.72%   +0.04%     
==========================================
  Files          82       82              
  Lines       21273    21287      +14     
  Branches     2879     2884       +5     
==========================================
+ Hits        18653    18674      +21     
+ Misses       1861     1852       -9     
- Partials      759      761       +2     

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