Allow non-interactive way to delete a tenant using kubectl plugin

[harshavardhana]

Is your feature request related to a problem? Please describe.
Currently kubectl minio delete asks for confirmation, implement a flag --force to avoid interactive behavior.

Describe the solution you'd like
kubectl minio delete --force tenant-name

Describe alternatives you've considered
Alternatives right now are to get the tenant yaml from the kubectl get tenants.minio.min.io tenant-name -o yaml is a bit - kludgy.

Additional context
Mainly to be run as scripts