Ensure having generate_issue_description service

Aleksei Lipniagovrequested to merge
al-allow-generate-issue-description-service into main

What does this MR do and why?

Ensure having generate_issue_description service.

Remove mentioned UP from service auto-gen ignore list.

It's a separate MR & issue not directly related to anthropic- and vertex- proxy endpoints.

References

gitlab-org/gitlab#554542 (closed)

Edited by Aleksei Lipniagov

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