Fix ccache and distcc setup

RULE_LAUNCH_COMPILE is not meant for use. It's meant for internal ctest use only per the documentation.

CMakeLists.txt

@@ -354,13 +354,9 @@ add_compile_definitions( $<$<BOOL:${KICAD_BUILD_ARCH_ARM64}>:KICAD_BUILD_ARCH_AR
 if (USE_CCACHE)
   find_program(CCACHE_FOUND ccache)
   if(CCACHE_FOUND)
-    get_property(RULE_LAUNCH_COMPILE GLOBAL PROPERTY RULE_LAUNCH_COMPILE)
-    set(RULE_LAUNCH_COMPILE "${RULE_LAUNCH_COMPILE} ${CCACHE_FOUND}")
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${RULE_LAUNCH_COMPILE})
-
-    get_property(RULE_LAUNCH_LINK GLOBAL PROPERTY RULE_LAUNCH_LINK)
-    set(RULE_LAUNCH_LINK "${RULE_LAUNCH_LINK} ${CCACHE_FOUND}")
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ${RULE_LAUNCH_LINK})
+    # Set ccache on the actual lang
+    list(APPEND CMAKE_C_COMPILER_LAUNCHER ${CCACHE_FOUND})
+    list(APPEND CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE_FOUND})
 
     message(STATUS "Used ${CCACHE_FOUND} for compilation.")
   else(CCACHE_FOUND)
@@ -375,9 +371,9 @@ endif(USE_CCACHE)
 if (USE_DISTCC)
   find_program(DISTCC_FOUND distcc)
   if(DISTCC_FOUND)
-    get_property(RULE_LAUNCH_COMPILE GLOBAL PROPERTY RULE_LAUNCH_COMPILE)
-    set(RULE_LAUNCH_COMPILE "${RULE_LAUNCH_COMPILE} ${DISTCC_FOUND}")
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${RULE_LAUNCH_COMPILE})
+    list(APPEND CMAKE_C_COMPILER_LAUNCHER ${DISTCC_FOUND})
+    list(APPEND CMAKE_CXX_COMPILER_LAUNCHER ${DISTCC_FOUND})
+
     message(STATUS "Using ${DISTCC_FOUND} for distributed build.")
   else(DISTCC_FOUND)
     message(INFO "Distcc was requested but not found.")