Timothy Jacobs b80ba269f6 REST API: Add support for settings to specify their own additionalProperties.
This switches the Settings Controller to use `rest_default_additional_properties_to_false` and deprecates its own method.

Props anna.bansaghi.
Fixes #56493.


git-svn-id: https://develop.svn.wordpress.org/trunk@54131 602fd350-edb4-49c9-b593-d223f7449a82
2022-09-11 23:28:39 +00:00
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