Provide Multi-Container Support for Services and Workers in polymorphic-app chart

[Luv7804]

Description

Add multi-container support to the polymorphic-app chart for both services and workers. This enables sidecar patterns, shared resources, and multiple containers per pod with individual configurations.

Requirements

• Support multiple containers in a single pod for services and workers
• Provide individual health checks per container:
  • HTTP
  • TCP
  • Exec
• Enable StatefulSet with multiple containers
• Support workers with:
  • Health checks
  • Autoscaling
  • Multi-container configuration
• Create shared templates for code reusability between services and workers

Acceptance Criteria

• Multi-container pods function correctly for both services and workers
• All health check types are supported per container
• Shared and container-specific resources behave as expected
• Workers support multi-container setups with autoscaling and health checks
• Template validation passes for all configurations
• Kubernetes installation succeeds for all test cases