Update Twenty Twenty-Five

[juanfra]

Updating Twenty Twenty-Five with the code from three PRs that didn't make it to RC3: #666, #668, #669

Trac ticket: https://core.trac.wordpress.org/ticket/62351

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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.

[github-actions]

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Props juanfra.

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[juanfra]

cc @peterwilsoncc

[github-actions]

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[desrosj]

Merged in https://core.trac.wordpress.org/changeset/59362.