Changeset 55754 for trunk/tests/phpunit/tests/user/getTheAuthorMeta.php

Tests: Split the tests from user/author.php into individual test classes.

This aims to make get_the_author_*() tests more discoverable and easier to expand.

Follow-up to [691/tests], [692/tests], [695/tests], [28362], [31098], [34687], [53147], [54717], [54726], [55591].

See #57841.