Allow probe scheme to be customised for TLS deployments

[fiddyspence]

… HTTP/S termination options for liveness/readiness/startup probes

Summary

Adds a configuration option and settings in the deployment to facilitate TLS enabled pods

Description

Adds a probeScheme setting in values.yaml which allows the various probes to be either HTTP or HTTPS

Defaults to plain HTTP

Ticket Link

None

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