fix(overflowmenuitem): show title tooltip when disabled

[tay1orjones]

Closes #12257

Changelog

Changed

• remove pointer-events: none, replace with cursor: not-allowed
• update story to include an example using disabled and requireTitle

Testing / Reviewing

1. Open the OverflowMenu/Default story
2. hover over the disabled option
3. the title text should appear on hover

title.text.appears.mov

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[tw15egan]

LGTM 👍 ✅