Add a workaround to include some via parameters for room v12 tombstone links. (#4413)

Without them, following the link fails as previously the server could use the server name from the room ID (which in and of itself seems somewhat error prone).

ElementX/Sources/Services/Room/RoomProxyProtocol.swift

@@ -200,4 +200,13 @@ extension JoinedRoomProxyProtocol {
         await updateMembers()
         return membersPublisher.value
     }
+    
+    // This is a horrible workaround for not having any server names available when using tombstone links with v12 room IDs.
+    func knownServerNames(maxCount: Int) -> any Sequence<String> {
+        membersPublisher.value
+            .prefix(1000) // No need to go crazy here…
+            .compactMap { $0.userID.split(separator: ":").last.map(String.init) }
+            .uniqued()
+            .prefix(maxCount)
+    }
 }