fix(TimePicker): Assignment of className props only to the container element

[NAS-IBM]

Closes https://github.com/carbon-design-system/carbon/issues/19518

Changelog

Changed

• Updated unit test cases
• Assigning of "className" property to the TimePicker Node and TimePicker Input Node
• Two props (inputClassName and pickerClassName) are introduced to handle the backward compatibility

Testing / Reviewing

• Define the "className" attribute for the TimePicker Component
• Inspect the DOM Element

For example,

<TimePicker id="time-picker" className="time-picker-container" />

For the above component, DOM would be rendered like,

PR Checklist

As the author of this PR, before marking ready for review, confirm you:

• [X] Reviewed every line of the diff
• [X] Updated documentation and storybook examples
• [X] Wrote passing tests that cover this change ~~Addressed any impact on accessibility (a11y)~~ ~~Tested for cross-browser consistency~~
• [X] Validated that this code is ready for review and status checks should pass

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recheck

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.65%. Comparing base (639bce3) to head (28baf4c). Report is 62 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #19573   +/-   ##
=======================================
  Coverage   84.65%   84.65%           
=======================================
  Files         373      373           
  Lines       14715    14715           
  Branches     4846     4796   -50     
=======================================
  Hits        12457    12457           
  Misses       2108     2108           
  Partials      150      150           

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