fix: panel: body padding prop on panel does not work

[dkilgore-eightfold]

SUMMARY:

Fixes scenarios where both bodyPadding and headerPadding props are set.

panelPadding.mp4

GITHUB ISSUE (Open Source Contributors)

#565

CHANGE TYPE:

• Bugfix Pull Request
• Feature Pull Request

TEST COVERAGE:

• Tests for this change already exist
• I have added unittests for this change

TEST PLAN:

Pull the PR branch and run yarn and yarn storybook. Verify a Panel story bodyPadding and headerPadding props behave as expected.

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[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@4a5a70f). Click here to learn what that means.
Patch has no changes to coverable lines.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #569   +/-   ##
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  Files           ?      791           
  Lines           ?    16923           
  Branches        ?     5948           
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  Hits            ?    14376           
  Misses          ?     2481           
  Partials        ?       66           

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