WIP: Move EE JavaScript spec to their own directory

What does this MR do?

Move EE JavaScript spec to their own directory

Are there points in the code the reviewer needs to double check?

Please review all my JavaScript! I am not familiar with them.

Why was this MR needed?

This is part of https://gitlab.com/gitlab-org/gitlab-ee/issues/3107

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Review
  • Has been reviewed by Frontend

What are the relevant issue numbers?

Closes #3871 (closed)