Add apt key proxy support (#34541)
Add apt key proxy support (#34541)

* add missing proxy_ config options and defaults

* add support for http proxy for apt-key actions

* Fixes #34360.

* fix lint

* adjust defaults that are strings to empty strings

* change proxy_port to a default of 0 for config validator

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt