unittests: clean up memory for detect quic tests

src/detect-quic-cyu-hash.c

@@ -257,6 +257,7 @@ static int DetectQuicCyuHashTest01(void)
 
     FLOW_DESTROY(&f);
     UTHFreePacket(p);
+    StatsThreadCleanup(&tv);
     PASS;
 }
 

src/detect-quic-cyu-string.c

@@ -256,6 +256,7 @@ static int DetectQuicCyuStringTest01(void)
 
     FLOW_DESTROY(&f);
     UTHFreePacket(p);
+    StatsThreadCleanup(&tv);
     PASS;
 }