Adding OpenShift Supported Version in the Bundle

[cniackz]

Fixes: https://github.com/miniohq/engineering/issues/743

This addition is needed to get Pull Request accepted in https://github.com/redhat-openshift-ecosystem/certified-operators repository as shown in url below:

https://github.com/redhat-openshift-ecosystem/certification-releases/blob/main/4.9/ga/troubleshooting.md#get-supported-versions

Where we can see this text:

• Your annotations.yaml file needs to include an com.redhat.openshift.versions annotation indicating the OpenShift versions supported by your Operator.

As a result, we are going to observe:

annotations:
  # Core bundle annotations.
  operators.operatorframework.io.bundle.mediatype.v1: registry+v1
  operators.operatorframework.io.bundle.manifests.v1: manifests/
  operators.operatorframework.io.bundle.metadata.v1: metadata/
  operators.operatorframework.io.bundle.package.v1: minio-operator
  operators.operatorframework.io.bundle.channels.v1: stable

  # Annotations to specify OCP versions compatibility.
  com.redhat.openshift.versions: v4.6-v4.10

Then get-supported-versions is going to pass rh-operator-bundle-bot validation