Disable CMake test project build tests on WASM

The focus is now to run autotests. The _qt_internal_test_expect_pass
tests will be handled at a later stage.

Fixes: QTBUG-109788
Change-Id: I8a5b5d8b793e5e22faf1876f3d05bc967dbcf777
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>

src/corelib/Qt6CTestMacros.cmake

@@ -260,6 +260,9 @@ endfunction()
 #                so the argument containing list will look as following:
 #                    -DLIST_ARGUMENT=item1[[;]]item2[[;]]...itemN.
 macro(_qt_internal_test_expect_pass _dir)
+    if(WASM)
+        return()
+    endif()
     set(_test_option_args
       SIMULATE_IN_SOURCE
       NO_CLEAN_STEP