Editor: Fix preloaded REST API paths

[Mamaduka]

The two paths listed for preloading were silently failing.

See:

• ​https://github.com/WordPress/gutenberg/pull/64401
• ​https://github.com/WordPress/gutenberg/pull/64459

Gutenberg PR: ​https://github.com/WordPress/gutenberg/pull/64401 and ​https://github.com/WordPress/gutenberg/pull/64459.
Trac ticket: https://core.trac.wordpress.org/ticket/61884

[Mamaduka]

When providing an incorrect path to preload, the rest_preload_api_request will silently fail, and nothing will be preloaded.

• Fix typo for wp_template_part post type preload path for the Site Editor.
• Do not preload the wp_block post type for post editors. The endpoint doesn't support unbound queries, and the data is no longer needed during editor initialization.

[Mamaduka]

In 58904:

Editor: Fix preloaded REST API paths

When providing an incorrect path to preload, the rest_preload_api_request will silently fail, and nothing will be preloaded.

• Fix typo for wp_template_part post type preload path for the Site Editor.
• Do not preload the wp_block post type for post editors. The endpoint doesn't support unbound queries, and the data is no longer needed during editor initialization.

Props kirasong, tyxla, mamaduka.
Fixes #61884.

Committed https://core.trac.wordpress.org/changeset/58904.

Permissions for creating pages (OPTIONS /wp/v2/pages). Both requests are made in the useBlockEditorSettings hook, at the top of the post editor React tree.

Matches the preloaded path for the posts editor and hopefully will improve the Site Editor loading time a bit.

Gutenberg Issue: ​https://github.com/WordPress/gutenberg/pull/64890

[Mamaduka]

Re-opening as I found another issue with preload paths.

​https://github.com/WordPress/wordpress-develop/pull/7270

@noisysocks, I re-opened a similar ticket I had for 6.7.

@noisysocks, does this need another review/approval? It has been approved by @gziolo in the Gutenberg repo.

You're a core committer so technically you can commit without review 😛 Best practice is to get a second pair of eyes on it though.

[Mamaduka]

In 58984:

Editor: Update preloaded paths for the site editor

Add the OPTIONS /wp/v2/pages route to the list. The request is made via the useBlockEditorSettings hook at the top of the editor React tree. Preloading should improve the editor's loading time.

Avoid hardcoding paths for the 'attachment' post type; use the rest_get_route_for_post_type_items helper method instead.

Props mamaduka, noisysocks.
See #61884.

Committed in https://core.trac.wordpress.org/changeset/58984.