vhost inherits DQT from node

Rather than injecting node-level DQT when exporting definitions,
inject it into vhost's metadata when a vhost is created.

deps/rabbit/src/rabbit_vhost.erl

@@ -146,6 +146,7 @@ add(VHost, ActingUser) ->
     rabbit_types:ok_or_error(any()).
 add(Name, Description, Tags, ActingUser) ->
     add(Name, #{description => Description,
+                default_queue_type => rabbit_queue_type:default_alias(),
                 tags => Tags}, ActingUser).
 
 -spec add(vhost:name(), vhost:metadata(), rabbit_types:username()) ->

deps/rabbit/src/vhost.erl

@@ -215,6 +215,7 @@ disable_protection_from_deletion(VHost) ->
 -spec new_metadata(binary(), [atom()], rabbit_queue_type:queue_type() | 'undefined') -> metadata().
 new_metadata(Description, Tags, undefined) ->
     #{description => Description,
+        default_queue_type => rabbit_queue_type:default_alias(),
         tags => Tags};
 new_metadata(Description, Tags, DefaultQueueType) ->
     #{description => Description,

deps/rabbitmq_management/src/rabbit_mgmt_wm_definitions.erl

@@ -132,10 +132,7 @@ vhost_definitions(ReqData, VHostName, Context) ->
     ProductName = rabbit:product_name(),
     ProductVersion = rabbit:product_version(),
 
-    DQT = rabbit_queue_type:short_alias_of(rabbit_vhost:default_queue_type(VHostName)),
-    %% note: the type changes to a map
-    VHost1 = rabbit_queue_type:inject_dqt(VHost),
-    Metadata = maps:get(metadata, VHost1),
+    Metadata = vhost:get_metadata(VHost),
 
     TopLevelDefsAndMetadata = [
         {rabbit_version, rabbit_data_coercion:to_binary(Vsn)},
@@ -147,7 +144,6 @@ vhost_definitions(ReqData, VHostName, Context) ->
         {explanation, rabbit_data_coercion:to_binary(io_lib:format("Definitions of virtual host '~ts'", [VHostName]))},
         {metadata, Metadata},
         {description, vhost:get_description(VHost)},
-        {default_queue_type, DQT},
         {limits, vhost:get_limits(VHost)}
     ],
     Result = TopLevelDefsAndMetadata ++ retain_whitelisted(Contents),