d3d10core/tests: Run test_instanced_draw() separately.

dlls/d3d10core/tests/d3d10core.c

@@ -19268,7 +19268,6 @@ START_TEST(d3d10core)
     queue_test(test_private_data);
     queue_test(test_state_refcounting);
     queue_test(test_il_append_aligned);
-    queue_test(test_instanced_draw);
     queue_test(test_fragment_coords);
     queue_test(test_initial_texture_data);
     queue_test(test_update_subresource);
@@ -19342,4 +19341,8 @@ START_TEST(d3d10core)
     /* There should be no reason this test can't be run in parallel with the
      * others, yet it fails when doing so. (AMD Radeon HD 6310, Windows 7) */
     test_stream_output_vs();
+    /* Same here, this test fails randomly on Win10 when run together with
+     * others on Radeon GPUs. Radeon 560 (0x1002:0x67ef), both on the testbot
+     * and Stefan's macbook. */
+    test_instanced_draw();
 }