Merge topic 'post-rel-dev'

8382b6b0ff Configure CMake itself with policies through CMake 4.1
571b438d41 export: Increase maximum policy version in exported files to 4.1
8a7657cf87 Add deprecation warnings for policies CMP0151 and below

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !11527