rabbit_khepri: Use rabbit_db_cluster's members/2 and nodes/2

`locally_known_members/1` and `locally_known_node/1` were replaced with
`members/2` and `nodes/2` with `favor` set to `low_latency` - this
matches the interface for queries in Khepri.

Author: the-mikedavis

deps/rabbit/src/rabbit_khepri.erl

@@ -653,7 +653,7 @@ members() ->
 %% The returned list is empty if there was an error.
 
 locally_known_members() ->
-    case khepri_cluster:locally_known_members(?RA_CLUSTER_NAME) of
+    case khepri_cluster:members(?RA_CLUSTER_NAME, #{favor => low_latency}) of
         {ok, Members}    -> Members;
         {error, _Reason} -> []
     end.
@@ -683,7 +683,7 @@ nodes() ->
 %% The returned list is empty if there was an error.
 
 locally_known_nodes() ->
-    case khepri_cluster:locally_known_nodes(?RA_CLUSTER_NAME) of
+    case khepri_cluster:nodes(?RA_CLUSTER_NAME, #{favor => low_latency}) of
         {ok, Nodes}      -> Nodes;
         {error, _Reason} -> []
     end.