escape characters in git user name

What does this MR do?

Escapes quotes in a user name so that when a new project is created the home page to clone the repo correctly escapes the quotes.

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

Why was this MR needed?

To fix an issue with displaying usernames with quotes

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together

What are the relevant issue numbers?

Closes #18308 (closed)