Descriptive error message for deprecated argument for get_categories function

[gagan0123]

When someone uses the argument

type=link

WordPress throws a generic argument deprecated error message without stating which one. With this patch it gives the exact message and how to resolve it.

[gagan0123]

Patch for the corresponding ticket

[swissspidy]

34318.diff​ is an updated patch with refined wording and proper i18n.

[gagan0123]

Found that the same issue was there in another file as well, made patch with swissspidy's correction for both places

[gagan0123]

Found the wordings swissspidy used a bit misleading, changed it to a bit more specific

[DrewAPicture]

In 35264:

Taxonomy: Improve deprecated argument strings for the 'link' type in get_categories() and wp_dropdown_categories().

Props swissspidy, gagan0123.
Fixes #34318.