Remove unneeded regions for Secret Detection service
What this MR does?
This MR removes Cloud Run regions not needed for the Secret Detection service since the service should be deployed where the GitLab Rails instance is deployed i.e., only in us-east1 region.
MR reflecting changes in the Provisioner project: https://gitlab.com/gitlab-com/gl-infra/platform/runway/provisioner/-/merge_requests/251
Relevant Issue Numbers
Edited by Vishwa Bhat