perf(gitalyctl): reduce interval to move status
What
Reduce the move_status_update from 15s to 5s which will poll
GitLab's API more frequent.
Why
Looking at the percentiles most moves are taking less than 15 seconds so we are wasting time waiting:
- p99: 10s
- p95: 3s
- p50: 1s
One thing to keep in mind is the request rate/minute to GitLab's API, at the moment this is very small which is 700 requests/minute and we'll end up ~3x it which would be 2100/minute and we don't get rate limited either, since ops cluster IPs are allow listed
