Update a batch of Project Import/Export relations to use AttributesPermitter & allow-list approach (service desk setting, security setting, prometheus metrics, container expiration policy, project feature)

Transition 5 small Project Import models to use AttributesPermitter & allow-list approach when Importing.

This will allow us to see if allow-list approach works as expected, if there are any issues that need to be fixed.

See https://gitlab.com/gitlab-org/gitlab/-/issues/37322 for reasons why.

Proposed list of models:

• service desk setting
• security setting
• prometheus metrics
• container expiration policy
• project feature

Once completed, create a new issue to update the next batch of relations.

Implementation plan

• backend Extend lib/gitlab/import_export/project/import_export.yml with new section that contains attributes that should be included for import:

included_attributes:
  service_desk_setting:
  security_setting:
  prometheus_metrics:
  container_expiration_policy:
  project_feature: