CMake: Fix execution of svgtoqml tool

It fails in a no-prefix per-repo build of qtdeclarative standalone
examples build, with the following error:

ninja: error:
'examples/quick/quickshapes/weatherforecast/Qt6::svgtoqml', needed by
'examples/quick/quickshapes/weatherforecast/.qt/svgtoqml/Europe_generated.qml',
missing and no known rule to make it

Wrap the command in a <TARGET_FILE> genex, and prepend the tool
wrapper shell script for Windows hosts.

Amends 018b10ff71

Change-Id: Ib4aa91f3680cad40ac462a48b09a4acf795ff7ae
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>

tools/svgtoqml/Qt6SvgToQmlMacros.cmake

@@ -61,9 +61,13 @@ function(qt6_target_qml_from_svg target)
         list(APPEND svgtoqml_args "${file_absolute}")
         list(APPEND svgtoqml_args "${svgtoqml_result}")
 
+        _qt_internal_get_tool_wrapper_script_path(tool_wrapper)
         add_custom_command(
             OUTPUT "${svgtoqml_result}"
-            COMMAND ${QT_CMAKE_EXPORT_NAMESPACE}::svgtoqml ${svgtoqml_args}
+            COMMAND
+                ${tool_wrapper}
+                $<TARGET_FILE:${QT_CMAKE_EXPORT_NAMESPACE}::svgtoqml>
+                ${svgtoqml_args}
             DEPENDS
                 "${file_absolute}"
                 ${QT_CMAKE_EXPORT_NAMESPACE}::svgtoqml