Add posibility to define scheme as HTTPS in readiness and liveness probes

[joseacl]

Describe the bug

If we enable SSL in kafka-ui backend, and deploy into k8s using the helm chart, the deployment creates the livenessProbe and readinessProbe configuration with the default value of HTTP.
https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#http-probes

In the current Deployment.yaml there is not way to specify the scheme field for probes

Set up

Steps to Reproduce
Steps to reproduce the behavior:

1. Enable SSL in Kafka-ui. (SERVER_SSL_ENABLED=true, SERVER_SSL_KEY_STORE='myserver.keystore', SERVER_SSL_KEY_STORE_PASSWORD='mypassword'
2. Deploy the application in kubernetes using the helm chart.
3. Kubernetes restart the pods, since there is not valid certificate for that operation.

Expected behavior
Make able to configure the deployment telling to kubernetes to skipping the certificate verification.

[joseacl]

PR created #2924 for that issue.