Describe the bug

When configuring Loki 6.2 in Openshift using the Loki operator a secret has to be created to contain AWS credentials for S3, one of the fields is endpoint, as soon as you specify a private VPC S3 endpoint the operator fails to reconcile with:

  message: 'Invalid object storage secret contents: endpoint for AWS S3 must include
    correct region: https://s3.us-east-1.amazonaws.com'

To Reproduce

Steps to reproduce the behavior:

1. Create a LokiStack resource which contains:
   secret:
   name: logging-loki-s3
   type: s3
2. In the OCP secret itself use a private VPC S3 endpoint such as https://bucket.vpce-*-us-east-1c.s3.us-east-1.vpce.amazonaws.com
3. oc get lokistacks.loki.grafana.com -o yaml, notice the aforementioned error, operator won't reconcile

Expected behavior

Ability to specify a private VPC S3 endpoint.

Environment:

• Infrastructure: Openshift 4.18 in AWS
• Deployment tool: Loki operator