support network policies configuration

[AndrewChubatiuk]

fixes VictoriaMetrics/helm-charts#2977

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Summary by cubic

Adds first‑class NetworkPolicy support across all operator CRDs via an optional networkPolicy field so the operator can create, update, and clean up Kubernetes NetworkPolicies for component pods. Also improves VMRule patching by defaulting record and alert to empty strings for safer strategic merges.

• New Features
  • Optional networkPolicy on VMSingle, VMAgent, VMAlert, VMAlertmanager, VMAuth, VLSingle, VLAgent, VTSingle, VMAnomaly, and cluster sub-components (Insert, Select, Storage, Balancer). The operator builds a namespaced NetworkPolicy using the CR’s selector labels, infers policyTypes from ingress/egress rules, reconciles changes, and removes orphaned policies. Addresses feature: add network policies to charts helm-charts#2977.
  • VMRule rules now support strategic-merge patches using record and alert as merge keys (both default to ""), enabling clean JSON/YAML patches.

^{Written for commit e304951. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 47 files

_{Re-trigger cubic}