upgpkg: 46.1-1: Update to new release, switch to git source, specify SPDX license, add transitive deps, add config for nvchecker

It's supported since meson 0.57.0.

archlinux/devtools!109 (comment 74475)

* Replace dependency: python-pydrive -> python-pydrive2.

FTR, commands used to change arch=() and then verify the changes:

$ sed -Ei "/^arch=/{s/ *?['\"]?i686['\"]? *?//;s/ *$//}" */*/PKGBUILD*

$ grep -r i686 * | grep arch= | grep -v repos

$ svn diff | grep -A 1 ^-[^-] | grep -v -- -- | cut -c2- |
  while IFS=$'\n' read -r l1; IFS=$'\n' read -r l2; do
    echo "$l1 -> $l2"
  done | sort -u