Fixed LKE operations

Use API's default for filesystem when creating new disks through Inst…

…ance.disk_create

Added proxy_protocol to NodeBalancerConfg

Fixed IndexError on empty paginated responses

Allow requesting non-default page sizes

Added new fields to Region object

Allow passing allow_auto_disk_resize to Instance.resize

Dropped support for EOL python versions; updated docs and added suppo…

…rt for LKE

Fixed bug in ip_allocate function

Added gpus to Linode Type