Expose config via authorino cr to enable the deployment of envoy sidecar to authorino

[laurafitzgerald]

Is your feature request related to a problem? Please describe.
Expose configuration in the authorino cr which allows a user to ask for the addition of the following lable to the authorino deployment "sidecar.istio.io/inject":"true"

Describe the solution you'd like
A value exposed in the cr which the operator responds to by applying the label.
The label should be applied if the value is set to true
The label should be removed if the value isn't present or set to false.

Additional context
This work forms part of a set of issues to enable the automatic configuration of https://github.com/Kuadrant/kuadrant-operator/blob/a1ca1d0ee2ca7dac79ad921b0ff30ded2c986612/doc/install/mtls-configuration.md#configure-mtls-between-the-gateway-and-kuadrant-components

[laurafitzgerald]

Copied comment Work being done in authorino-operator #236

[guicassolato]

Instead of something specific to sidecar injection, probably what we want here is the propagation of labels added to the Authorino CR all the way down to the pods that are linked to the Deployment object managed by the operator in relation to that CR, i.e. add the labels to the deployment template. IOW, #236.

[laurafitzgerald]

Thanks @guicassolato @eguzki had pointed to that work in another ticket and I've linked it above. It definitely makes sense to go that route rather than adding a separate method for this particular piece of work.