No pre-delete hook in pravega operator chart

[SrishT]

Description

The pravega operator helm chart does not have a pre-delete hook in it. As a result, the operator can be uninstalled with orphan custom resources hanging around.
A pre-delete hook needs to be added to the operator chart that would verify that all custom resources have been cleaned up before deleting the operator.

Importance

should have

Location

pravega operator helm charts