Add 'label' argument to register_setting

[Mamaduka]

A sync ticket for ​https://github.com/WordPress/gutenberg/pull/59243.

The 'label' will displayed to users when editing core or custom settings via block editors. It avoids hardcoding Settings labels and improves extensibility.

Please take a look at the original issue for additional details: ​https://github.com/WordPress/gutenberg/issues/41637.

🚧

Trac ticket: https://core.trac.wordpress.org/ticket/61023

Thanks for the review, @TimothyBJacobs 🙇

The wp-api-generated.js file will need to be rebuilt before committing.

I always forget about it. I wish there was a pre-commit hook for it. To update it, I need to run a full PHP test suite, correct?

Yeah the process is a bit frustrating. Was GB active on your checkout?

Was GB active on your checkout?

No. I've got a separate installation just for core patches.

@Mamaduka Is this good to merge?

@ellatrix, yes, it's good to be merged.

Could you merge it?

Should ​https://github.com/WordPress/gutenberg/pull/61351 be included here or in a separate backport?

[ellatrix]

In 58230:

Options: Add 'label' argument to register_setting.

The 'label' will displayed to users when editing core or custom settings via block editors. It avoids hardcoding Settings labels and improves extensibility.

Backports ​https://github.com/WordPress/gutenberg/pull/59243.

Props mamaduka, timothyblynjacobs, ellatrix.

Fixes #61023.