Improve testcase issue titles

Uses more concise paths in the titles because some of the text included before was not necessary.

Also adds ~"Enterprise Edition" to EE tests.

See https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/456

Here's a couple of examples of issues created using this change:

• An EE test: https://gitlab.com/mlapierre-test/testcases-test/-/issues/498
• If it were a CE test: https://gitlab.com/mlapierre-test/testcases-test/-/issues/499

This change shouldn't to be merged and released until a script is ready to update the current issue titles.