Includes:
* Moving the comments directly above `wp.i18n._x()` so that they can be picked up properly.
* Simplifying the context to avoid unnecessarily translating the string twice for the same use case.
* Using the established translator comments format for consistency.
Follow-up to [59428].
Reviewed by SergeyBiryukov, desrosj.
Merges [59431 to the 6.7 branch.
Fixes#62402.
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