feat: adding classname prop to sheet component

[jacobo-dominguez-wgu]

Description

Adding classname props to Sheet component, the props added are:

• sheetClassName: to specify custom classes to the sheet element
• className: to specify custom classes to the base/container element

Also created the unit tests to support these additions.
It closes #3750

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.33%. Comparing base (411e19e) to head (61264e7).
⚠️ Report is 35 commits behind head on release-23.x.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-23.x    #3855      +/-   ##
================================================
+ Coverage         94.30%   94.33%   +0.03%     
================================================
  Files               242      242              
  Lines              4229     4235       +6     
  Branches            960      959       -1     
================================================
+ Hits               3988     3995       +7     
+ Misses              237      236       -1     
  Partials              4        4              

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[PKulkoRaccoonGang]

I think it’s a good idea to allow passing custom class names both for the wrapper and for the component itself 👍

• sheetClassName: to specify custom classes to the sheet element
• className: to specify custom classes to the base/container element

I’d like to suggest reconsidering the naming here. It might be clearer for consumers if we use containerClassName for the base/container element, and simply className for the sheet element.
This is just a suggestion, I’d be interested to hear your thoughts.

[brian-smith-tcril]

@jacobo-dominguez-wgu did you see @PKulkoRaccoonGang's note?

I’d like to suggest reconsidering the naming here. It might be clearer for consumers if we use containerClassName for the base/container element, and simply className for the sheet element.
This is just a suggestion, I’d be interested to hear your thoughts.

[jacobo-dominguez-wgu]

@brian-smith-tcril, @PKulkoRaccoonGang I came up with these classNames names based on some similarities on the IconButton props, but now that you mention it makes more sense your approach, I already updated the pr to follow your suggestion.

[openedx-semantic-release-bot]

🎉 This PR is included in version 23.15.0 🎉

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