feat: support TLS authentication and customized volumes

[tomjo]

Master Issue: #108

Motivation

Helm chart changes related to #143 Adds the updated CRD and adds support for volumes to the operator to provide the necessary certificates (e.g. from a secret). I bumped the version to v0.5.0 because that is the milestone tag used on #143.

Modifications

• Adds the updated CRD to support TLS authentication
• Adds support for volumes/volumeMounts to the operator to provide the necessary certificates for TLS authentication (e.g. from a secret)

Verifying this change

• [ ] Make sure that the change passes the CI checks.

This change added tests and can be verified as follows:

• Added helm chart test for default values - no volume/volumeMount is added to the deployment

Documentation

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