Update report size marker objects class

[HaleySchuhl]

Describe your changes Update pcv.report_size_marker input parameters to take new roi formatted Object.

Type of update Is this a:

• update

Associated issues #945

Additional context Add any other context about the problem here.

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• [ ] PR functionality reviewed in a Jupyter Notebook
• [x] All tests pass
• [x] Test coverage remains 100%
• [ ] Documentation tested
• [x] New documentation pages added to plantcv/mkdocs.yml
• [x] Changes to function input/output signatures added to updating.md
• [ ] Code reviewed
• [ ] PR approved

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (release-4.0@3129d85). Click here to learn what that means. The diff coverage is 100.00%.

:exclamation: Current head eda1f1a differs from pull request most recent head d47b063. Consider uploading reports for the commit d47b063 to get more accurate results

@@              Coverage Diff               @@
##             release-4.0     #955   +/-   ##
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  Coverage               ?   99.98%           
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  Files                  ?      161           
  Lines                  ?     6849           
  Branches               ?        0           
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  Hits                   ?     6848           
  Misses                 ?        1           
  Partials               ?        0           

Flag	Coverage Δ
unittests	99.98% <100.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
plantcv/plantcv/report_size_marker_area.py	100.00% <100.00%> (ø)