Merge topic 'additional_clean_files_help'

e61074c6 Help: Improve ADDITIONAL_CLEAN_FILES documentation
cebccdeb Help: Move ADDITIONAL_MAKE_CLEAN_FILES dir prop to deprecated section

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !3428
Status Job ID Name Coverage
  External
passed cmake-minoc-linux-release-lint-iwyu-tidy

passed cmake-moonshade-osx-debug-ninja

passed cmake-moonshade-osx-release-makefiles

passed cmake-terfin-windows-release-vs2019

passed cmake-minoc-linux-release-lint-iwyu-tidy

passed cmake-minoc-linux-release-lint-iwyu-tidy

passed cmake-minoc-linux-release-lint-iwyu-tidy

00:13:42

passed cmake-minoc-linux-release-lint-iwyu-tidy

passed cmake-minoc-linux-release-lint-iwyu-tidy

passed cmake-minoc-linux-release-lint-iwyu-tidy

00:13:40

passed cmake-minoc-linux-release-lint-iwyu-tidy

passed cmake-moonshade-osx-debug-ninja

passed cmake-moonshade-osx-debug-ninja

passed cmake-moonshade-osx-debug-ninja

00:11:40

passed cmake-moonshade-osx-release-makefiles

00:13:50

passed cmake-moonshade-osx-release-makefiles

passed cmake-moonshade-osx-release-makefiles

passed cmake-terfin-windows-release-vs2019

passed cmake-terfin-windows-release-vs2019

00:47:28

passed cmake-terfin-windows-release-vs2019