Merge topic 'vs-zero_check-proj'

925da7d428 VS: Write ZERO_CHECK.proj for VS19 and above
11b8366e55 VS: Introduce IsInSolution to check whether a target is in sln file
0682cd3657 VS: Add proj as a project type to VsProjectType
6ab2c40c17 cmGlobalVisualStudio7Generator: Drop unused method

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !6891