Operator needs to set Kiali CR external_services fields

For 2.1 we need Maistra/OSSM to set some fields in the Kiali CR as the default values are not being used:

• external_services.istio.istiod_deployment_name
• external_services.istio.istio_sidecar_injector_config_map_name

The additions would be analogous to what is already done for external_services.istio.config_map_name, see:

https://github.com/maistra/istio-operator/blob/maistra-2.1/resources/helm/overlays/istio-telemetry/kiali/templates/kiali-cr.yaml#L41

For the deployment name, because Maistra may not use the default of 'istiod', Kiali is unable to locate the deployment and gather up relevant information, like the CLUSTER_NAME env var. Similar issues for the sidecar_injector_config_map_name.

These additions apply only to OSSM 2.1 and Kiali 1.36.  Older versions are unaffected.