Ensure only alive QQ replica states are reported

when checking replica states to help avoid missing
inactive replicas e.g. on QQ checks from cli tools

(cherry picked from commit 4914850)

Author: Ayanda-D

deps/rabbit/src/rabbit_quorum_queue.erl

@@ -442,17 +442,25 @@ become_leader0(QName, Name) ->
 all_replica_states() ->
     Rows0 = ets:tab2list(ra_state),
     Rows = lists:map(fun
-                         ({K, follower, promotable}) ->
-                             {K, promotable};
-                         ({K, follower, non_voter}) ->
-                             {K, non_voter};
-                         ({K, S, _}) ->
-                             %% voter or unknown
-                             {K, S};
-                         (T) ->
-                             T
+                        (T = {K, _, _}) ->
+                            case rabbit_process:is_registered_process_alive(K) of
+                                true ->
+                                    to_replica_state(T);
+                                false ->
+                                    []
+                            end;
+                        (_T) ->
+                            []
                      end, Rows0),
-    {node(), maps:from_list(Rows)}.
+    {node(), maps:from_list(lists:flatten(Rows))}.
+
+to_replica_state({K, follower, promotable}) ->
+    {K, promotable};
+to_replica_state({K, follower, non_voter}) ->
+    {K, non_voter};
+to_replica_state({K, S, _}) ->
+    %% voter or unknown
+    {K, S}.
 
 -spec list_with_minimum_quorum() -> [amqqueue:amqqueue()].
 list_with_minimum_quorum() ->