Skip test cases when client creation fails

Updated the client creation check to skip test cases if the client cannot be created, instead of marking them as errors. This ensures tests dependent on a successful client creation do not fail unnecessarily but are instead skipped.

client_test.go

@@ -1735,7 +1735,7 @@ func TestClient_DialSendConcurrent_online(t *testing.T) {
 
 	client, err := getTestConnection(true)
 	if err != nil {
-		t.Errorf("unable to create new client: %s", err)
+		t.Skipf("failed to create test client: %s. Skipping tests", err)
 	}
 
 	var messages []*Msg