As a Loki Administrator, I want to be able to configure a custom TLS Certificate Authority bundle for connections to swift object storage, so that I can verify the validity of Swift server side certificates in on premise clusters.

Acceptance Criteria

1. The Loki administrator can provide a custom path to a Certificate Authority Bundle file for the swift object storage for all Loki components.

Developer Notes

1. Currently Loki does not support any customization for the Swift object storage client: https://github.com/grafana/loki/blob/main/pkg/storage/chunk/client/openstack/swift_object_client.go#L22-L27