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