Merge topic 'update-kwsys'

79f30a8fc3 Merge branch 'upstream-KWSys' into update-kwsys
626f3d43f0 KWSys 2025-06-10 (d780326e)
575106995b Source: Drop support for KWSys Encoding without std::wstring methods

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !10866