Separate requirements and hints when caching

[stxue1]

Resolves an issue with some of the conformance tests with caching as mentioned on the Toil side: DataBiosphere/toil#5187 (comment)

iwd-container-entryname1.cwl has the DockerRequirement under the requirements key: https://github.com/common-workflow-language/cwl-v1.2/blob/707ebcd2173889604459c5f4ffb55173c508abb3/tests/iwd/iwd-container-entryname1.cwl#L14

But iwd-container-entryname3.cwl has the DockerRequirement under the hints key: https://github.com/common-workflow-language/cwl-v1.2/blob/707ebcd2173889604459c5f4ffb55173c508abb3/tests/iwd/iwd-container-entryname3.cwl#L14

When hashing for caching, hints and requirements are considered the same, so a previous run of iwd-container-entryname1.cwl will result in a cache hit for iwd-container-entryname3.cwl, even though the two tasks should have different behaviors/results

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 70.76%. Comparing base (1b56338) to head (8e020fb).

Files with missing lines	Patch %	Lines
cwltool/command_line_tool.py	50.00%	3 Missing and 1 partial ⚠️

❗ There is a different number of reports uploaded between BASE (1b56338) and HEAD (8e020fb). Click for more details.

HEAD has 16 uploads less than BASE

Flag	BASE (1b56338)	HEAD (8e020fb)
	17	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2102       +/-   ##
===========================================
- Coverage   84.77%   70.76%   -14.02%     
===========================================
  Files          46       46               
  Lines        8359     8362        +3     
  Branches     1960     1961        +1     
===========================================
- Hits         7086     5917     -1169     
- Misses        805     1838     +1033     
- Partials      468      607      +139     

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