Tests/Build tools: Various term related test improvements.

Modifies the tests for `get_tag_link()`, `get_term()` and `get_term_field()` to:

- use shared fixtures as possible
- improves variable names
- add `@covers` annotation as required

Props peterwilsoncc, costdev.
See #57841.

Built from https://develop.svn.wordpress.org/trunk@55924


git-svn-id: http://core.svn.wordpress.org/trunk@55436 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.3-alpha-55923';
+$wp_version = '6.3-alpha-55924';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.