Update FindVcvars.cmake

[allemangD]

The version of FindVcvars.cmake used here is a bit out-of-date and does not support any VS 2019 build.

In particular, I am on VS 1929, which would be added by this PR: scikit-build/cmake-FindVcvars#1

It would also be helpful to update FindVcvars in Slicer proper once the above PR is merged; both on the master and v4.11 branches.

[jcfr]

Changes have been integrated in the scikit-build project.

Worth noting that related changes have already been integrated in Slicer in these commits:
https://github.com/Slicer/Slicer/pull/5817/commits

Could you confirm that the remaining tasks would be to backport the commits to the v4.11 branch ?

[jcfr]

Relevant commits have been pushed to the v4.11 branch:

[jcfr]

Additionally, local checkout of Slicier 4.11 on each factory (metroxplex, overload and factory-south-macos) has been updated to include these commits.

@allemangD Let me know if anything else need to be done to address this issue.