Raise Git GC (Housekeeping) Lease Timeout to 24h

What does this MR do?

Raises the LeaseTimeout to 24 hours for calls to git repack and git gc.

Why was this MR needed?

GitRepackIncremental running amock on gitlab.com: https://gitlab.com/gitlab-com/infrastructure/issues/2558

The alternatives we had was

1. timeout on the calls themself

• would lead to repos that never are repacked/gc'd making git clone run amok instead. (much worse, since that's called more often than housekeeping)

2. raise the lease timeout.

• might leave repos in need of a repack unrepacked for 24h instead of the current 1h.

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?

https://gitlab.com/gitlab-com/infrastructure/issues/2558