Remove redundant unit test for `WP_Comment_Query` 'status'.

This old test is too resource-intensive, and duplicates the more precise
tests introduced in [29980].

See #30017.

git-svn-id: https://develop.svn.wordpress.org/trunk@29981 602fd350-edb4-49c9-b593-d223f7449a82
Add unit test for `WP_Comment_Query` 'search' param.

git-svn-id: https://develop.svn.wordpress.org/trunk@29982 602fd350-edb4-49c9-b593-d223f7449a82