Add platform infrastructure configuration

infrastructure/controllers/prometheus-operator-crds/README.md

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+# Prometheus Operator CRDs
+
+`prometheus-operator-crds` chart `31.0.0`만 독립적으로 렌더한다. CRD는
+cluster-scoped API와 저장 객체의 스키마 경계이므로 workload 실패 시에도 자동 삭제하지
+않는다. `kube-prometheus-stack` 쪽에서는 CRD 생성을 별도로 비활성화한다.

infrastructure/controllers/prometheus-operator-crds/kustomization.yaml

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+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+helmGlobals:
+  chartHome: .helm/charts
+
+helmCharts:
+  - name: prometheus-operator-crds
+    repo: https://prometheus-community.github.io/helm-charts
+    version: 31.0.0
+    releaseName: prometheus-operator-crds
+    namespace: observability
+    valuesFile: values/home.yaml
+    includeCRDs: true
+    skipTests: true

infrastructure/controllers/prometheus-operator-crds/values/home.yaml

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+crds:
+  annotations: {}
+  alertmanagerconfigs:
+    enabled: true
+  alertmanagers:
+    enabled: true
+  podmonitors:
+    enabled: true
+  probes:
+    enabled: true
+  prometheusagents:
+    enabled: true
+  prometheuses:
+    enabled: true
+  prometheusrules:
+    enabled: true
+  scrapeconfigs:
+    enabled: true
+  servicemonitors:
+    enabled: true
+  thanosrulers:
+    enabled: true