fix(ComposedModal): Address several problems with selectorsFloatingMenus prop on ComposedModal

[dcwarwick]

Closes #10000

Changelog

Changed

• packages/react/src/components/ComposedModal/ComposedModal.js -- fixed proptype, and remove prop from ...others that are passed through to the DOM.
• packages/react/src/internal/wrapFocus.js -- default Carbon CSS selectors for floating menus/popus are added to prop value rather than replaced by it.

Testing / Reviewing

Build, tests, and storybook can help verify that this PR does not break existing usage. In particular, a story or test case with a menu/tooltip/date-picker inside a composed modal would be useful to verify that focus handling continues to work as expected.

I will also apply the changes locally to a build of carbon-design-system/ibm-products#1360 and verify that the issues that were problematic with that fix are resolved by these changes.

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[tay1orjones]

These make sense to me - thanks for including so much detail in the original issue!

How fun that you got to open and close the 10,000th issue on the repository! 🏅 🎉