Block support: Add server-side processing for ariaLabel

[t-hamano]

• Gutenberg PR: Block support: Add server-side processing for ariaLabel gutenberg#69096
• Trac ticket: https://core.trac.wordpress.org/ticket/62919

Testing Instructions

See Gutenberg PR for reference.

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[t-hamano]

This PR also allows the aria-label attribute by default in the get_block_wrapper_attributes function, otherwise blocks that have this support would need to explicitly specify the additional attribute, like so:

$wrapper_attributes = get_block_wrapper_attributes( array( 'aria-label' => $attributes['ariaLabel'] ) );

[github-actions]

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[github-actions]

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Core Committers: Use this line as a base for the props when committing in SVN:

Props wildworks, fabiankaegy, joemcgill.

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[fabiankaegy]

The code here looks good to me 👍

It matches how other similar block supports handle their server side processing.

[joemcgill]

A couple minor formatting suggestions. Otherwise, looks ok.

[Mamaduka]

All the feedback is addressed, and it looks good to commit.

[github-actions]

A commit was made that fixes the Trac ticket referenced in the description of this pull request.

SVN changeset: 59925
GitHub commit: 13fe8be

This PR will be closed, but please confirm the accuracy of this and reopen if there is more work to be done.