refactor(sli): ignore ProjectExportWorker from sidekiq
What
Ignore the ProjectExportWorker from our SLI calculation for the sidekiq service.
Why
In gitlab-com/gl-infra/production#17165 (comment 1661925874) the p95 for the worker is always close to the threshold, and the p99 always surpasses it.
This is a known issue and will be worked on at gitlab-org&7940, in the meantime, we shouldn't page the on-call for this worker.
