Merge topic 'ci-windows-arm64'

09c1b1db07 gitlab-ci: Add windows-arm64 native jobs for Ninja and VS
61ebd7d083 ci: Download cmake on windows-arm64
93a5d89b42 ci: Teach cmake download script on Windows to branch on host architecture
1ccffcf0ea ci: Factor out helper to load python into environment on Windows
781303c0e2 ci: Factor out helper to load qt into environment on Windows
b0d16c7f74 Tests: Fix CTest.UpdateGIT under repo-local defaultBranch config

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Ben Boeckel <ben.boeckel@kitware.com>
Merge-request: !7905