Regenerate gitlab.pot file

What does this MR do?

This regenerates the gitlab.pot file to remove the "project avatar" unused message

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation created/updated or follow-up review issue created
• [-] Code review guidelines
• [-] Merge request performance guidelines
• [-] Style guides
• [-] Database guides
• [-] Separation of EE specific content

closes #12699 (closed)