Create Helm Test for Thanos' Object Storage Configuration Minio Tenant

Issue #70 (closed) 's MR (see here) deploys MinIO Operator as Thanos will deploy a MinIO Tenant as part of the default Object Storage Configuration. Per the suggestion of the Storage and Collaboration team, Helm Testing to ensure the connection between the Tenant and Operator should be included as part of the Umbrella tests. This issue is to ensure that helm tests are created.