LucidGrasp 1.1.0 - Full OS scan enabled

Fix Windows CI: use Qt 6.5-compatible arch and restore MSVC toolset pin

Qt 6.5 LTS ships only MSVC 2019 (v142) Windows desktop binaries. Requesting
win64_msvc2022_64 made aqtinstall fail with "The packages ['qt_base'] were
not found while parsing XML of package information!", which broke the
Windows release job before it ever reached the build.

- arch: win64_msvc2022_64 -> win64_msvc2019_64
- restore msvc-dev-cmd toolset 14.29, matching the v142 toolset used to
  build both Qt 6.5 msvc2019_64 and the OpenCV 4.10.0 vc16 prebuilts

Verified locally with aqtinstall 3.3.0: list-qt confirms win64_msvc2019_64
exists for all 6.5.x, and install-qt 6.5.3 win64_msvc2019_64 --autodesktop
now completes successfully.