feat(Cmake/PCH): use target_precompile_headers instead of cotire (#5082)

src/cmake/macros/FindPCHSupport.cmake

@@ -1,24 +1,9 @@
-if (MSVC)
-  # Specify the maximum PreCompiled Header memory allocation limit
-  # Fixes a compiler-problem when using PCH - the /Ym flag is adjusted by the compiler in MSVC2012,
-  # hence we need to set an upper limit with /Zm to avoid discrepancies)
-  # (And yes, this is a verified, unresolved bug with MSVC... *sigh*)
-  #
-  # Note: This workaround was verified to be required on MSVC 2017 as well
-  set(COTIRE_PCH_MEMORY_SCALING_FACTOR 500)
-endif()
-
-include(cotire)
+#
+# Copyright (C) 2016+     AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+#
 
 function(ADD_CXX_PCH TARGET_NAME_LIST PCH_HEADER)
-  # Use the header for every target
   foreach(TARGET_NAME ${TARGET_NAME_LIST})
-    # Disable unity builds
-    set_target_properties(${TARGET_NAME} PROPERTIES COTIRE_ADD_UNITY_BUILD OFF)
-
-    # Set the prefix header
-    set_target_properties(${TARGET_NAME} PROPERTIES COTIRE_CXX_PREFIX_HEADER_INIT ${PCH_HEADER})
+    target_precompile_headers(${TARGET_NAME} PRIVATE ${PCH_HEADER})
   endforeach()
-
-  cotire(${TARGET_NAME_LIST})
 endfunction(ADD_CXX_PCH)