Add `jobs_count` field to `LimitExceededError`
What does this MR do?
This MR adds a jobs_count
field to the extra context gathered when a LimitExceededError
occurs. This field will be useful for filtering when examining LimitExceededError
occurrences in Kibana. See https://gitlab.com/gitlab-org/gitlab/-/issues/285093#note_652056255 for more context
Issue
#285093