service: fix template mounts for additional containers

roles/service/vars/main/mounts.yaml

@@ -36,3 +36,33 @@ _service_container_mounts: >-
     _service_container_bind_mounts +
     _service_container_template_mounts
   }}
+
+
+_service_all_template_mounts: >-
+  {{
+    (
+      _service_template_mounts +
+      (
+        _service_additional_containers |
+        map(attribute='mounts') |
+        flatten
+      )
+    ) |
+      selectattr('type', '==', 'template') |
+      unique
+  }}
+_service_all_template_mount_directories: >-
+  {{
+    _service_all_template_mounts |
+      map(attribute='source') |
+      map('dirname') |
+      unique |
+      select('!=', '')
+  }}
+_service_all_template_mount_host_files: >-
+  {{
+    _service_all_template_mounts |
+      map(attribute='source') |
+      map('regex_replace', '\.j2$', '') |
+      map('regex_replace', '^', _service_host_directory ~ '/mounts/')
+  }}