* Add missing translators comments.
* Fix placement of some translators comments.
Translators comments should be on the line directly above the line containing the translation function call for optimal compatibility with various `.pot` file generation tools.
The CS auto-fixing, which changed some inconsistent function calls to multi-line function calls, is part of the reason why this was no longer the case for a select group of translators comments.
Includes minor code layout fixes.
Patch `44360-wp-admin-includes-dir.patch` of the series.
Props flipkeijzer, alvarogois, michielatyoast
See #44360
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Prior to about 2013, many class methods lacked even access modifiers which made the `@access` notations that much more useful. Now that we've gotten to a point where the codebase is more mature from a maintenance perspective and we can finally remove these notations. Notable exceptions to this change include standalone functions notated as private as well as some classes still considered to represent "private" APIs.
See #41452.
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