[infra] Switch Win10 Golo tasks to upgraded Windows-10-19043 pool

Bug: chromium:1203327
Change-Id: I36de6f9ad0bba04854911cf8d060b7a754e116f0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/449058
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
(cherry picked from commit cd0b01cf18cc0b5080e265f5e33c8355baa90e6d)
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/451038
Reviewed-by: Eric Boren <borenet@google.com>