Form conversion: Compute/Infrastructure/PXE/PXE Servers Add/Edit

[himdel]

Convert form to use DDF/React and API - parent issue #6825

Location: Compute/Infrastructure/PXE/PXE Servers
Form: Add/Edit

current type: Ruby
API state:
API pr:
ManageIQ/manageiq-api#594

PM Input: 2 - Medium
Comments:
https://bugzilla.redhat.com/show_bug.cgi?id=1537267

imported status: DONE
imported assigned: @Hyperkid

[h-kataria]

Converted in #5614