Block Supports: Add height support to dimensions block supports

[aaronrobertshaw]

This ticket tracks the backport of PHP files for the following Gutenberg updates:

​https://github.com/WordPress/gutenberg/pull/71914

These updates include the PHP changes to add height block supports.

New dimensions block supports are being added to support new blocks such as the proposed Icon block. See ​https://github.com/WordPress/gutenberg/pull/71227 for further context.

Trac ticket: https://core.trac.wordpress.org/ticket/64202

This PR brings the changes from the following Gutenberg PRs to core:

​https://github.com/WordPress/gutenberg/pull/71914

### Description
Adds a new dimensions.height block support to facilitate the creation of new blocks such as the Icon block.

See: ​https://github.com/WordPress/gutenberg/pull/71227

### Testing

1. Adopt height block support for a dynamic block e.g. Cover via its block.json file
2. Add a height value for the chosen test block in your theme.json file
3. Create a post with the test block type
4. Confirm the global style is applied to your test block

[audrasjb]

As per today's 7.0 bug scrub:
This is a Gutenberg merge ticket and there's a PR, but it's still a draft for now. Pinging @aaronrobertshaw for a status update.

[aaronrobertshaw]

Thanks for the ping. Similar to the width block support. There were some further follow-ups to this block support in Gutenberg. I'll update this PR as soon as possible and get this backport reviewed.

[ramonopoly]

In 61620:

Block Supports: Add height to dimensions supports

This PR introduces dimensions.height to the list of available block supports.

This block support enables, in the future, the removal of the custom height controls in blocks such as Image, Spacer and others in favor of customizations via block supports.

Props aaronrobertshaw, andrewserong, ramonopoly, welcher, wildworks, youknowriad.

Fixes #64202.

Committed in r61620 and ​https://github.com/WordPress/wordpress-develop/commit/3fe3acf0e675537f4a3765405249931aaaf895a6

[audrasjb]

This is worth mentioning in the Field Guide.
Also adding needs-dev-note just in case we can mention it in a more general note.

[aaronrobertshaw]

There's been a draft dev note up for review for a little while that covers all the dimension supports enhancements including the selectors API change, and the additions of width and height block supports.

​​https://make.wordpress.org/core/?p=121783&preview=1&_ppp=8f7d804279