Moved ouroboros-network-testing to ouroboros-network

* `ouroboros-network-testing`      -> `ouroboros-network:tests-lib` in `tests-lib/lib`
* `ouroboros-network-testing:test` -> `ouroboros-network:tests-lib` in `tests-lib/tests`

Author: coot

dmq-node/dmq-node.cabal

@@ -172,10 +172,8 @@ test-suite dmq-test
     io-classes,
     io-sim,
     kes-agent-crypto,
-    ouroboros-network:{framework, protocols, protocols-tests-lib},
-    ouroboros-network:{protocols, protocols-tests-lib},
+    ouroboros-network:{framework, protocols, protocols-tests-lib, tests-lib},
     ouroboros-network-api,
-    ouroboros-network-testing,
     quickcheck-instances,
     serialise,
     tasty,