Move helm templates into folders (#7113)

* refactor: move helm templates into respective service folders

* fix: update template path reference in filer-statefulset for s3-secret

k8s/charts/seaweedfs/templates/shared/seaweedfs-grafana-dashboard.yaml

@@ -0,0 +1,19 @@
+{{- if .Values.global.monitoring.enabled }}
+{{- $files := .Files.Glob "dashboards/*.json" }}
+{{- if $files }}
+{{- range $path, $file := $files }}
+{{- $dashboardName := regexReplaceAll "(^.*/)(.*)\\.json$" $path "${2}" }}
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ printf "%s" $dashboardName | lower | replace "_" "-" }}
+  namespace: {{ $.Release.Namespace }}
+  labels:
+    grafana_dashboard: "1"
+data:
+  {{ $dashboardName }}.json: |-
+{{ toString $file | indent 4 }}
+{{- end }}
+{{- end }}
+{{- end }}