jobs: add job for managing harbor quotas

• adds a new update_harbor_quotas job.
• applies the quota to all existing projects prefixed with tool-
• the project quota should now be managed from maintain-harbor.yaml so make sure to update this file before deploying this new version :)
• Important: The default project quota will continue to apply to new projects and must be managed manually, as this requires system-admin privileges that the maintain-harbor user does not have.
• For the sake of simplicity and until we need it, this does not allow for changing project quotas on an individual basis.

Bug: T352417