proxmox: Add public key support: fix #19487 (#21142)
proxmox: Add public key support: fix #19487 (#21142)

* fix #19487

* add 'version_added'

* Check for version compatibility, Ignore keys if incompatible

* add comment about version support

* remove 'type' as requested

* fix merge error

thaim/ansible,thaim/ansible