CI: Re-enable Windows VS2019 builds

The failures are fixed, but I didn't notice this had been silently
disabled in !4272.

Re-enable the VS2019 build.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4374>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4374>
1 file changed