feat: allow disabling chown for persistent storage in scheduler-docker-local

Some systems - such as a mounted read-only CIFS filesystem - do not fully support chown, and chowning should be considered optional for cases when the host os has already taken care of permissioning. This commit allows users to disable chown by setting a property on the scheduler-docker-local plugin.

plugins/scheduler-docker-local/install

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/property-functions"
 
 scheduler-docker-local-install() {
   declare desc="scheduler-docker-local install plugin trigger"
@@ -7,6 +8,8 @@ scheduler-docker-local-install() {
 
   mkdir -p "${DOKKU_LIB_ROOT}/data/scheduler-docker-local"
   chown -R "${DOKKU_SYSTEM_USER}:${DOKKU_SYSTEM_GROUP}" "${DOKKU_LIB_ROOT}/data/scheduler-docker-local"
+
+  fn-plugin-property-setup "scheduler-docker-local"
 }
 
 scheduler-docker-local-install "$@"