vagrant: 2.2.9 -> 2.2.10

ChangeLog: https://github.com/hashicorp/vagrant/blob/v2.2.10/CHANGELOG.md#2210-august-24-2020

Apart from the usual `gemset`-update the following patches were altered:

* Deprecation fix on ruby 2.6.5: was removed since the underlying issue
  was fixed upstream.
* 0004-Support-system-installed-plugins.patch: re-downloaded the rebased
  version from `salsa.debian.org`[1] where we originally obtained the patch
  from.
* use-system-bundler-version: re-applied on top of Vagrant 2.2.10.

[1] https://salsa.debian.org/ruby-team/vagrant/-/blob/9d86f222/debian/patches/0004-Support-system-installed-plugins.patch

pkgs/development/tools/vagrant/use-system-bundler-version.patch

@@ -1,8 +1,8 @@
-diff --git i/lib/vagrant/bundler.rb w/lib/vagrant/bundler.rb
-index 301e40e37..e361ab510 100644
---- i/lib/vagrant/bundler.rb
-+++ w/lib/vagrant/bundler.rb
-@@ -217,7 +217,7 @@ module Vagrant
+diff --git a/lib/vagrant/bundler.rb b/lib/vagrant/bundler.rb
+index 336ac1e05..1bfd84c0d 100644
+--- a/lib/vagrant/bundler.rb
++++ b/lib/vagrant/bundler.rb
+@@ -470,7 +470,7 @@ module Vagrant
        source_list = {}
        system_plugins = plugins.map do |plugin_name, plugin_info|
          plugin_name if plugin_info["system"]