Build: Remove -fpch-instantiate-templates detection, it is enabled by default since CMake 3.19

(cherry picked from commit 55a19f15d01b5f06c158f1dfbd2c43e4f5d6837c)

Author: Shauren

cmake/compiler/clang/settings.cmake

@@ -3,6 +3,9 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "AppleClang")
   # apple doesnt like to do the sane thing which would be to use the same version numbering as regular clang
   # version number pulled from https://en.wikipedia.org/wiki/Xcode#Toolchain_versions for row matching LLVM 11
   set(CLANG_EXPECTED_VERSION 12.0.5)
+  # enable -fpch-instantiate-templates for AppleClang (by default it is active only for regular clang)
+  set(CMAKE_C_COMPILE_OPTIONS_INSTANTIATE_TEMPLATES_PCH -fpch-instantiate-templates)
+  set(CMAKE_CXX_COMPILE_OPTIONS_INSTANTIATE_TEMPLATES_PCH -fpch-instantiate-templates)
 endif()
 
 if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS CLANG_EXPECTED_VERSION)