Move the selenium qwasmwindow test to the selenium dir

This is done in anticipation of another test for dragging

Change-Id: I56961eb1d16a4a6b6c58890c9c882dea813dfa08
Reviewed-by: Piotr Wierciński <piotr.wiercinski@qt.io>
Reviewed-by: Mikołaj Boc <Mikolaj.Boc@qt.io>

tests/manual/wasm/selenium/qwasmwindow/CMakeLists.txt

@@ -31,6 +31,6 @@ add_custom_command(
 add_custom_command(
     TARGET qwasmwindow_harness POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E copy
-            ${CMAKE_CURRENT_SOURCE_DIR}/../../../../util/wasm/qtwasmserver/qtwasmserver.py
+            ${CMAKE_CURRENT_SOURCE_DIR}/../../../../../util/wasm/qtwasmserver/qtwasmserver.py
             ${CMAKE_CURRENT_BINARY_DIR}/qtwasmserver.py
 )