[cmake] Different MSVC versions create different cpm ext project builds.

Will rebuild all ext packages on msvc.

scripts/cmake/BuildExternalProject.cmake

@@ -29,7 +29,11 @@ macro(BuildExternalProject_set_build_dir target argn_string)
             IS_PREFIX PROJECT_BINARY_DIR "${CPM_SOURCE_CACHE}" _is_inside_build
         )
         if(NOT _is_inside_build)
-            string(SHA256 _hash "${CMAKE_GENERATOR};${argn_string}")
+            string(
+                SHA256
+                    _hash
+                    "${CMAKE_GENERATOR};${argn_string}${MSVC_TOOLSET_VERSION}"
+            )
             set(build_dir "${CPM_SOURCE_CACHE}/_ext/${target}/${_hash}")
         endif()
     endif()