[PROMOTE TO BLOCKING] Create Group file templates creates file via custom Dockerfile file template

What does this MR do?

Promotes the test Create Group file templates creates file via custom Dockerfile file template to the blocking bucket

This test was identified in the reliable e2e test report: #442287 (closed)

(This MR was automatically generated by gitlab_quality-test_tooling at 2024-02-19 02:05:21 UTC)