MSVC: Revert use of temporary -std:c++23preview flag for C++23

Revert commit b3f1c60aff (MSVC: Use -std:c++23preview flag for C++23
when available, 2025-03-12), except for the VS flag table update.
MSVC documentation states that the flag will be removed in the future
when `-std:c++23` is added.  Therefore it is only suitable for manual
specification by end-users.

Issue: #26692

Modules/Compiler/MSVC-CXX.cmake

@@ -42,11 +42,7 @@ if ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.0.24215.1 AND
     set(CMAKE_CXX_STANDARD_LATEST 20)
   endif()
 
-  if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.43.34808)
-    set(CMAKE_CXX23_STANDARD_COMPILE_OPTION "-std:c++23preview")
-    set(CMAKE_CXX23_EXTENSION_COMPILE_OPTION "-std:c++23preview")
-    set(CMAKE_CXX_STANDARD_LATEST 23)
-  elseif(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.29.30129)
+  if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.29.30129)
     set(CMAKE_CXX23_STANDARD_COMPILE_OPTION "-std:c++latest")
     set(CMAKE_CXX23_EXTENSION_COMPILE_OPTION "-std:c++latest")
     set(CMAKE_CXX_STANDARD_LATEST 23)