edit_prediction: Skip type definition lookup for intrinsic TSX/JSX tags

[gaauwe]

Skip intrinsic TSX/JSX tag names when gathering identifiers for edit prediction context.

I bisected a TypeScript regression to #49748. That change caused edit prediction context to query definition / typeDefinition for lowercase JSX tags like p, which could trigger incorrect unversioned TypeScript diagnostics, such as Cannot find name 'p'.

This change filters those intrinsic tag names out while still keeping user-defined component tags like Component.

Self-Review Checklist:

• I've reviewed my own diff for quality, security, and reliability
• Unsafe blocks (if any) have justifying comments
• The content is consistent with the UI/UX checklist
• Tests cover the new/changed behavior
• Performance impact has been considered and is acceptable

Closes #51316

Release Notes:

• Fixed a TypeScript issue that could show incorrect diagnostics caused by edit prediction context lookups.