Fix actuator health probe paths for kubernetes-spring module

[Deepanshu1231]

What does this PR do?

Fixes missing actuator health probe configuration in the
kubernetes-spring module.

Problem

• application.properties was empty with no actuator configuration
• serviceDeployment.yaml had no liveness or readiness probes

Fix

• Added actuator health probe properties to application.properties
• Added correct liveness (/actuator/health/liveness) and readiness
  (/actuator/health/readiness) probes to serviceDeployment.yaml

Related Issue

Fixes #17969

[lor6]

Thanks @Deepanshu1231 The code for the article https://www.baeldung.com/spring-boot-kubernetes-self-healing-apps is in https://github.com/eugenp/tutorials/tree/master/spring-cloud-modules/spring-cloud-kubernetes/kubernetes-selfhealing I've applied your fixes there: #19281 Closing here.