Merge topic 'cmake-E-skip-startup'

65313c5cab cmake -E: Skip start-up work for commands that do not need it
b48d6ec19b cmSystemTools: Consolidate common process-wide initialization

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: scivision <michael@scivision.dev>
Merge-request: !12651