chore: Update codeowners to match UI governance standards

[jjaquish]

Description

Update to the codeowners as per ui governance standards and the repo assignment spreadsheet. Done in bulk with Claude assistance so worth a close inspection.

[RHCLOUD-50188(https://issues.redhat.com/browse/RHCLOUD-50188)

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Screenshots

Before:

After:

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Checklist ☑️

• PR only fixes one issue or story
• Change reviewed for extraneous code
• UI best practices adhered to
• Commits squashed and meaningfully named
• All PR checks pass locally (build, lint, test, E2E)

• (Optional) QE: Needs QE attention (OUIA changed, perceived impact to tests, no test coverage)
• (Optional) QE: Has been mentioned
• (Optional) UX: Needs UX attention (end user UX modified, missing designs)
• (Optional) UX: Has been mentioned