Merge topic 'doc-policy-deprecation-schedule'

3e0720a2ae Help: Add cmake_minimum_required(VERSION) example to cmake-policies(7)
085de39879 Help: Document policy transition schedule in cmake-policies(7)
60e302a539 Help: Drop policy scope from cmake-policies(7)
3b926b32e3 Help: Drop CMAKE_MINIMUM_REQUIRED_VERSION from cmake-policies(7)
ec9e5feb93 Help: Organize cmake-policies(7) by supported and unsupported policies
6be0fe22be Help: Mention CMAKE_POLICY_DEFAULT_CMP<NNNN> in cmake_minimum_required

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !10222