Signed-off-by: NRémy Coutable <remy@rymai.me>

This was caused by a webpack config issue that would only look in folders that only had lower case letters. This has been changed to include any word character

Closes #32913

Add test.js and test.css to disable animations during testing and include these in _head when testing

Add test.js and test.css to disable animations during testing and include these in _head when testing

- GroupFilterableList extends from FilterableList which is used in other places that doesn’t use Vue.
- GroupFilterableList interacts with a Vue store object.
- Deleted groups_list.js since is not needed anymore, filtering is handled via ajax in GroupFilterableList

Single commit squash of all changes for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10878

It's needed due to https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10777 being merged with squash.