Fix: Resolve conflicts for deployment in diferent namespaces (#5862)

Signed-off-by: Andrei Kvapil <kvapss@gmail.com>

k8s/charts/seaweedfs/templates/cert-issuer.yaml

@@ -0,0 +1,13 @@
+{{- 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" . }}-issuer
+  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:
+  selfSigned: {}
+{{- end }}