Tidy up mock creation. (#5627)

* Use our standard XYZMock(.init()) pattern everywhere instead of XYZMock.default.

* Remove the configuration parameter label on mock convenience inits.

* Update the enterprise submodule.

ElementX/Sources/Mocks/InvitedRoomProxyMock.swift

@@ -70,7 +70,7 @@ extension RoomInfoProxyMock {
         joinRule = .invite
         historyVisibility = .shared
         
-        powerLevels = RoomPowerLevelsProxyMock(configuration: .init())
+        powerLevels = RoomPowerLevelsProxyMock(.init())
     }
 }