[ Tech Debt] Replaced htmlIdGenerator with useGeneratedHtmlId

[cyberbuff]

Summary

Replaced htmlIdGenerator with useGeneratedHtmlId to support SSR. Fixes #7093

QA

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General checklist

• Browser QA
  - [ ] Checked in both light and dark modes
  - [ ] Checked in mobile
  - [ ] Checked in Chrome, Safari, Edge, and Firefox
  - [ ] Checked for accessibility including keyboard-only and screenreader modes
• Docs site QA
  - [ ] Added documentation
  - [ ] Props have proper autodocs (using @default if default values are missing) and playground toggles
  - [ ] Checked Code Sandbox works for any docs examples
• Code quality checklist
  - [ ] Added or updated jest and cypress tests
• Release checklist
  • A changelog entry exists and is marked appropriately.
    - [ ] If applicable, added the breaking change issue label (and filled out the breaking change checklist)
• Designer checklist
  - [ ] Updated the Figma library counterpart

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[tkajtoch]

Hi @cyberbuff! Thank you for contributing to EUI and giving #7093 a shot!

Unfortunately, useHtmlIdGenerator is a React hook and cannot be used the same way as htmlIdGenerator was. There's way more work to it than just replacing all usages of htmlIdGenerator - you'd likely need to create HoCs that inject useHtmlIdGenerator to class components and figure out the most performant way to do so.

If you still want to work on the issue, please open a proof of concept PR first that showcases your approach to using that hook inside React class components. This way, we can confirm it looks right and passes our tests before you put more work into it.

I will close this draft PR for now since the solution is wrong and may confuse others.