This aims to bring some consistency to the location of post template function tests, as well as to make the tests more discoverable and easier to expand.
Includes:
* Adding `@covers` tags.
* Renaming `get_post_parent()` and `has_post_parent()` tests to match the names of the functions.
Follow-up to [28398], [31522], [34654], [34950], [50127], [50396], [54717], [54726], [55590].
See #57841.
git-svn-id: https://develop.svn.wordpress.org/trunk@55591 602fd350-edb4-49c9-b593-d223f7449a82