CMake: use CMAKE_C_COMPILER_LAUNCHER instead of RULE_LAUNCH_COMPILE

as recommended by CMake maintainer
https://gitlab.kitware.com/cmake/cmake/-/issues/22405#note_983593

Signed-off-by: Be <be@mixxx.org>

CMakeLists.txt

@@ -127,10 +127,12 @@ mark_as_advanced( FORCE SCCACHE_PROGRAM )
 
 if( CCACHE_PROGRAM )
    message( STATUS "Found ccache: ${CCACHE_PROGRAM}" )
-   set_property( GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}" )
+   set( CMAKE_C_COMPILER_LAUNCHER "${CCACHE_PROGRAM}" )
+   set( CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE_PROGRAM}" )
 elseif( SCCACHE_PROGRAM )
    message( STATUS "Found sccache: ${SCCACHE_PROGRAM}" )
-   set_property( GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${SCCACHE_PROGRAM}" )
+   set( CMAKE_C_COMPILER_LAUNCHER "${SCCACHE_PROGRAM}" )
+   set( CMAKE_CXX_COMPILER_LAUNCHER "${SCCACHE_PROGRAM}" )
 else()
    message( STATUS "Could NOT find ccache nor sccache, no compiler caching enabled" )
 endif()