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/cert/cert-caissuer.yaml

@@ -0,0 +1,15 @@
+{{- if and .Values.global.enableSecurity (not .Values.certificates.externalCertificates.enabled)}}
+apiVersion: cert-manager.io/v1{{ if .Values.global.certificates.alphacrds }}alpha1{{ end }}
+kind: Issuer
+metadata:
+  name: {{ template "seaweedfs.name" . }}-ca-issuer
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app.kubernetes.io/name: {{ template "seaweedfs.name" . }}
+    helm.sh/chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+spec:
+  ca:
+    secretName: {{ template "seaweedfs.name" . }}-ca-cert
+{{- end }}