Revert "CMake: Fix *-metatypes.json creation for non-Ninja generators"

This reverts commit ab6950a.

Reason for revert: It breaks test_qml_app_deployment test in qtdeclarative for iOS and Xcode

Pick-to: 6.5
Fixes: QTBUG-121729
Task-number: QTBUG-120317
Change-Id: I356882a97f63534aa17133a4fbbb1db90295dfba
Reviewed-by: Jani Heikkinen <jani.heikkinen@qt.io>
(cherry picked from commit 6aed870)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit d0da8d9)

src/corelib/Qt6CoreMacros.cmake

@@ -1169,7 +1169,7 @@ function(qt6_extract_metatypes target)
         VERBATIM
     )
 
-    if(NOT CMAKE_GENERATOR MATCHES "^Ninja")
+    if(CMAKE_GENERATOR MATCHES " Makefiles")
         # Work around https://gitlab.kitware.com/cmake/cmake/-/issues/19005 to trigger the command
         # that generates ${metatypes_file}.
         add_custom_command(