React Compiler: enable remaining overlay, list and focus files #8721

Part of #8676 (P1). Depends on #8563, #8566, #8567 and #8565.

Problem

After the open React Compiler PRs land, these hot files are still listed in packages/react/script/react-compiler.mjs unsupportedPatterns:

• src/FilteredActionList/FilteredActionList.tsx
• src/SelectPanel/SelectPanel.tsx
• src/TreeView/TreeView.tsx
• src/AnchoredOverlay/AnchoredOverlay.tsx
• src/hooks/useAnchoredPosition.ts
• src/hooks/useFocusTrap.ts
• src/hooks/useFocusZone.ts
• src/hooks/useResizeObserver.ts

The build targets React 18 with a bundled useMemo fallback (rolldown.config.ts, utils/react-compiler-runtime.ts), so enabling the compiler is safe on both React 18 and 19.

Proposed approach

Enable the compiler one file or a small group at a time, following the pattern in #8563. Refactor only the patterns that block compilation. Coordinate with #8713 (useAnchoredPosition) and #8717 (SelectPanel) and #8718 (TreeView) so the PRs don't conflict.

Acceptance criteria

• Each file listed above is removed from unsupportedPatterns, or the issue records why it has to stay.
• Existing tests pass on React 18 and 19.
• PRs for DataTable, SelectPanel and TreeView report before and after numbers from Add repeatable performance benchmarks for list, tree and button stress cases #8714.