fix(mail): Drop shared service for dovecot and postfix

With different traffic policies and alike, the shared loadbalancer
causes more problems than it resolves. The original reason was that both
remote addresses would point to the same address, but this is a
non-issue given it all runs through a remote anyway.

charts/mok/Chart.yaml

@@ -3,7 +3,7 @@ name: mok
 description: |
   Mail on Kubernetes (MoK) is a project to deploy a functional mailserver that runs without a database server on Kubernetes, taking advantage of configmaps and secret.
 type: application
-version: 0.8.0
+version: 0.9.0
 sources:
   - https://de.postfix.org/ftpmirror/index.html
   - https://github.com/dovecot/core

charts/mok/templates/dovecot.yaml

 apiVersion: v1
 kind: Service
 metadata:
-  annotations:
-    metallb.universe.tf/allow-shared-ip: "{{ include "mok.fullname" . }}-mail"
   name: {{ include "mok.fullname" . }}-dovecot
   labels:
     {{- include "mok.labels" . | nindent 4 }}

charts/mok/templates/postfix.yaml

@@ -5,8 +5,6 @@ metadata:
   labels:
     {{- include "mok.labels" . | nindent 4 }}
     app.kubernetes.io/component: postfix
-  annotations:
-    metallb.universe.tf/allow-shared-ip: "{{ include "mok.fullname" . }}-mail"
 spec:
   ports:
   - port: 25

charts/mok/tests/__snapshot__/dovecot_test.yaml.snap

@@ -3,8 +3,6 @@ should match snapshot:
     apiVersion: v1
     kind: Service
     metadata:
-      annotations:
-        metallb.universe.tf/allow-shared-ip: RELEASE-NAME-mok-mail
       labels:
         app.kubernetes.io/component: dovecot
         app.kubernetes.io/instance: RELEASE-NAME

charts/mok/tests/__snapshot__/postfix_test.yaml.snap

@@ -3,8 +3,6 @@ should match snapshot:
     apiVersion: v1
     kind: Service
     metadata:
-      annotations:
-        metallb.universe.tf/allow-shared-ip: RELEASE-NAME-mok-mail
       labels:
         app.kubernetes.io/component: postfix
         app.kubernetes.io/instance: RELEASE-NAME