…rnmobile/port-quote-block-step-1

* 'master' of https://github.com/WordPress/gutenberg: (21 commits)
  Fix property path on get() call (#10962)
  Fixed typos on block api documentation (#11298)
  Export `switchToBlockType` to be used mobile side when merging two blocks. (#11294)
  RichText: Remove unused `ref` assignment to RichText (#11222)
  Remove findDOMNode from Tooltip component (#11169)
  Components: Remove redundant onClickOutside handler from Dropdown (#11253)
  added myself to the contributors list (#11260)
  Add complete post type labels for Resuable Blocks (#11278)
  Increase specificity for active radio/checkbox input styling (#11290)
  Fixed "artifact" misspelling in docs. (#11291)
  Nux package: fix incorrect named deprecated import (#11283)
  Rename parentClientId to rootClientId for consistency (#11274)
  chore(release): update changelog files
  chore(release): publish
  Update plugin version to 4.2.0. (#11258)
  Data: Use turbo-combine-reducers in place of Redux (#11255)
  Revert using Icon in IconButton to avoid regression in plugin icons (pinned icons) (#11256)
  Block List: Use default Inserter for sibling insertion (#11018)
  Editor: Optimize Inserter props generation and reconciliation (#11243)
  RichText: fix format placeholder (#11102)
  ...

# Conflicts:
#	packages/block-library/src/quote/index.js

Prevents RTC meta keys (wp_sync_awareness, wp_sync_update) from invalidating the posts cache group's last_changed timestamp on every write. This avoids cache invalidation storms during high-frequency collaborative editing.

Uses hook-based interception with a standalone registry since Core's register_meta() cannot be modified. When WordPress 7.0 ships with the native implementation, this backport is automatically disabled via function_exists guard.

New file: lib/compat/wordpress-7.0/post-meta-cache.php
- gutenberg_register_non_cacheable_post_meta() to register keys
- wp_post_meta_invalidates_query_cache() public API
- Replaces Core hooks with conditional version that checks registry

Modified: lib/compat/wordpress-7.0/collaboration.php
- Register RTC meta keys as non-cacheable

Modified: lib/load.php
- Load post-meta-cache.php before collaboration.php

See: https://core.trac.wordpress.org/ticket/64696
See: WordPress/wordpress-develop#11290

- Add backport-changelog/7.0/11290.md linking Core PR #11290 to Gutenberg PR #76687
- Suppress unused $post_type parameter warning (kept for API compatibility with Core)