Add sidekiq queries to the patroni SLI

Follow up to gitlab-com/runbooks!3487 (comment 565725954)

In that MR we've excluded Sidekiq queries from the patroni SLIs because they were not meeting the target we set when the metrics only included queries performed within web requests. So we've excluded the sidekiq query times for the time being.

To reintroduce them we should add some higher buckets to the gitlab_sql_primary_duration_seconds_bucket. Perhaps 1s and 2.5s?

The buckets are currently shared with the other sql metrics in https://gitlab.com/gitlab-org/gitlab/blob/c022d056db15d7d580d47636baa660d62b07fbcf/lib/gitlab/metrics/subscribers/active_record.rb#L15. Perhaps we should avoid adding the buckets there?

When we've done that, we can look at the results for the queries performed in Sidekiq and add separate SLIs to the patroni.jsonnet definition.