Update Gutenberg packages for WP 6.9 RC2

[priethor]

Changelog:

• ​Block Bindings: Add unit test coverage for `core/post-data` source
• ​Block Bindings: Error handling for external sources.
• ​Notes: Collapse note on blur
• ​Border-radius values triggers unintended px conversion
• ​Fix navigation tag entity binding
• ​DataViews: ensure primary actions are not wrapped in the list layout
• ​Fix: Fit Text may overflow into the padding area.
• ​Merge "Icon Size" and "Icon size" translation strings
• ​Notes: Improve delete confirm message for replies
• ​Fix: Custom font size taking over fit text.
• ​Fix a11y of descriptions and alerts for "Invalid" Nav Items
• ​Stretchy text: Hide variations in Block Inspector (hack)
• ​Update button label from "Add new note" to "Add new reply"
• ​Notes: Fix first note creation with pinned sidebar

Trac ticket: https://core.trac.wordpress.org/ticket/64267

[ellatrix]

In 61262:

Sync packages for WP 6.9 RC 2.

Changes can be found at ​https://github.com/WordPress/gutenberg/commits/wp/6.9/.

• [Block Bindings: Add unit test coverage for core/post-data source](​https://github.com/WordPress/gutenberg/pull/73055)
• [Block Bindings: Error handling for external sources.](​https://github.com/WordPress/gutenberg/pull/72585)
• [Notes: Collapse note on blur](​https://github.com/WordPress/gutenberg/pull/73158)
• [Border-radius values triggers unintended px conversion](​https://github.com/WordPress/gutenberg/pull/73324)
• [Fix navigation tag entity binding](​https://github.com/WordPress/gutenberg/pull/73255)
• [DataViews: ensure primary actions are not wrapped in the list layout](​https://github.com/WordPress/gutenberg/pull/73345)
• [Fix: Fit Text may overflow into the padding area.](​https://github.com/WordPress/gutenberg/pull/73327)
• [Merge "Icon Size" and "Icon size" translation strings](​https://github.com/WordPress/gutenberg/pull/73325)
• [Notes: Improve delete confirm message for replies](​https://github.com/WordPress/gutenberg/pull/73173)
• [Fix: Custom font size taking over fit text.](​https://github.com/WordPress/gutenberg/pull/73241)
• [Fix a11y of descriptions and alerts for "Invalid" Nav Items](​https://github.com/WordPress/gutenberg/pull/73177)
• [Stretchy text: Hide variations in Block Inspector (hack)](​https://github.com/WordPress/gutenberg/pull/73238)
• [Update button label from "Add new note" to "Add new reply"](​https://github.com/WordPress/gutenberg/pull/73189)
• [Notes: Fix first note creation with pinned sidebar](​https://github.com/WordPress/gutenberg/pull/73164)

Developed in ​https://github.com/WordPress/wordpress-develop/pull/10528.
See ​https://make.wordpress.org/core/handbook/about/release-cycle/block-editor-release-process-for-major-releases/#package-updates-and-core-patches.

Fixes #64267.
Props priethor.

[ellatrix]

This needs an additional review to backport to the 6.9 branch.

[davidbaumwald]

Looks good to backport to the 6.9 branch.

[davidbaumwald]

In 61263:

Editor: Sync packages for WP 6.9 RC 2.

Changes can be found at ​https://github.com/WordPress/gutenberg/commits/wp/6.9/.

[Block Bindings: Add unit test coverage for core/post-data source](​https://github.com/WordPress/gutenberg/pull/73055)
[Block Bindings: Error handling for external sources.](​https://github.com/WordPress/gutenberg/pull/72585)
[Notes: Collapse note on blur](​https://github.com/WordPress/gutenberg/pull/73158)
[Border-radius values triggers unintended px conversion](​https://github.com/WordPress/gutenberg/pull/73324)
[Fix navigation tag entity binding](​https://github.com/WordPress/gutenberg/pull/73255)
[DataViews: ensure primary actions are not wrapped in the list layout](​https://github.com/WordPress/gutenberg/pull/73345)
[Fix: Fit Text may overflow into the padding area.](​https://github.com/WordPress/gutenberg/pull/73327)
[Merge "Icon Size" and "Icon size" translation strings](​https://github.com/WordPress/gutenberg/pull/73325)
[Notes: Improve delete confirm message for replies](​https://github.com/WordPress/gutenberg/pull/73173)
[Fix: Custom font size taking over fit text.](​https://github.com/WordPress/gutenberg/pull/73241)
[Fix a11y of descriptions and alerts for "Invalid" Nav Items](​https://github.com/WordPress/gutenberg/pull/73177)
[Stretchy text: Hide variations in Block Inspector (hack)](​https://github.com/WordPress/gutenberg/pull/73238)
[Update button label from "Add new note" to "Add new reply"](​https://github.com/WordPress/gutenberg/pull/73189)
[Notes: Fix first note creation with pinned sidebar](​https://github.com/WordPress/gutenberg/pull/73164)
Developed in ​https://github.com/WordPress/wordpress-develop/pull/10528.
See ​https://make.wordpress.org/core/handbook/about/release-cycle/block-editor-release-process-for-major-releases/#package-updates-and-core-patches.

Reviewed by davidbaumwald.
Merges [61262] to the 6.9 branch.

Props priethor, ellatrix.
See #64267.