[CMake] Set the minimum required version to 3.23

This version of CMake was released in March 2022
https://github.com/Kitware/CMake/releases/tag/v3.23.0

This version is required to use FILE_SETs, which could help towards #16327 and #18419.

Author: ferdymercury

CMakeLists.txt

@@ -4,7 +4,7 @@
 # For the licensing terms see $ROOTSYS/LICENSE.
 # For the list of contributors see $ROOTSYS/README/CREDITS.
 
-cmake_minimum_required(VERSION 3.20 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.23 FATAL_ERROR)
 
 if(WIN32)
   # Set CMP0091 (MSVC runtime library flags are selected by an abstraction) to OLD