add option to disable registration of node during cluster formation

(cherry picked from commit 481ffb2)

Author: frederikbosch

deps/rabbit/priv/schema/rabbit.schema

@@ -1353,13 +1353,6 @@ end}.
     {datatype, {enum, [disc, disk, ram]}}
 ]}.
 
-%% Register node during cluster formation.
-%%
-
-{mapping, "cluster_formation.registration", "rabbit.cluster_formation.register", [
-    {datatype, {enum, [true, false]}}
-]}.
-
 {translation, "rabbit.cluster_formation.node_type",
 fun(Conf) ->
     %% if peer discovery backend isn't configured, don't generate
@@ -1377,6 +1370,13 @@ fun(Conf) ->
     end
 end}.
 
+%% Register node during cluster formation when backend supports registration.
+%%
+
+{mapping, "cluster_formation.registration", "rabbit.cluster_formation.register", [
+    {datatype, {enum, [true, false]}}
+]}.
+
 %% Cluster formation: lock acquisition retries as passed to https://erlang.org/doc/man/global.html#set_lock-3
 %%
 %% Currently used in classic, k8s, and aws peer discovery backends.