Enable text alignment for viewport states

[tellthemachines]

Trac ticket: https://core.trac.wordpress.org/ticket/65615

Syncs the changes from WordPress/gutenberg#80037.

Use of AI Tools

used codex/gpt 5.6

[github-actions]

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

Props isabel_brison, andrewserong.

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[github-actions]

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[andrewserong]

Backport looks good, and injecting into the declarations array is safe as everything gets filtered via the style engine once the declarations are passed to wp_style_engine_get_stylesheet_from_css_rules further down the chain.

LGTM!

[github-actions]

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

SVN changeset: 62702
GitHub commit: 0113999

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