Support Medusa's ssl_verify option

[rzvoncek]

What is missing?
Ability to set Medusa's ssl_verify option.

Why do we need it?
Medusa may use HTTPS when communicating with the storage backend. Sometimes, this involves using custom certificates. Up until recently, there was no way to control verification of these certificates, but since thelastpickle/cassandra-medusa#700, we have one.

We need to make the corresponding change to the operator that will configure Medusa as desired.

Environment

• K8ssandra Operator version:

  Insert image tag or Git SHA here

Anything else we need to know?: