TLS support

Created by: chess-knight

This topic was discussed in the HA Harbor deployment pull request.

For now we use threat model to generally trust the network(internalTLS is disabled) and use TLS where it is easy to do. E.g. redis supports tls, but harbor doesn't support redis with tls yet. So use just basic auth for the communication between harbor and redis beacause it is easy to do. Also trust the network because both harbor and redis are deployed to the same k8s cluster(network).

This issue is created for the record and also potential future investigation/enhancement.