refactor: converted index.js to index.ts for OverflowMenu

[Gururajj77]

Main issue: #16154
Closes #16444
Closes #16447 as part of exporting props for Overflowmenu

Changed from Index.js to Index.tsx as part of typescript adoption.

Changelog

New

• New index.tsx file

Changed

• Asserted OverflowMenuComponent as typeof React.Component for type assertion
• Changed renderIcon's type as ComponentType<IconProps>
• Broadened Offset interface to accept null and undefined matching PropType assertion
• Added IconProps type as part of renderIcon's assertion
• made aria-label as option in the main interface
• exported OverflowMenuProps

Testing / Reviewing

• Run the deploy preview with overflowmenu and check the functionality to be intact
• This code might have a breaking change, if so please let me know.

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[carbon-automation]

Hey there! v11.58.0 was just released that references this issue/PR.