feat: Add PDB API version override to support Kubernetes 1.25+

[MaxLikesCode]

Makes the Pod Disruption Budget API version configurable in the k8soketi Helm chart and defaults to the stable policy/v1 API.

Changes

• Template: Modified pdb.yaml template to use {{ .Values.pdb.apiVersion | default "policy/v1beta1" }} instead of hardcoded policy/v1beta1
• Values: Added pdb.apiVersion: policy/v1 to use the stable API by default

Background

The policy/v1beta1 API for PodDisruptionBudget was:

• Deprecated in Kubernetes 1.21
• Removed in Kubernetes 1.25

Benefits

• ✅ Forward compatible: Defaults to stable policy/v1 API
• ✅ Backward compatible: Allows override to policy/v1beta1 for older clusters
• ✅ Configurable: Users can set any API version via values
• ✅ Safe upgrade path: Existing deployments continue working with fallback default

Testing

• Verified template renders correctly with both API versions
• Maintains existing functionality while supporting modern Kubernetes clusters