Merge topic 'doc-3.22-relnotes'

9f0b52b8e6 Help: Update Sphinx versionadded directives for 3.22 release
c632a7105c Help: Organize and revise 3.22 release notes
48e503ec78 Help: Consolidate 3.22 release notes

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !6606