Form conversion: Cloudintel/Chargeback/Rates/Compute Add/Edit

[himdel]

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

Location: Cloudintel/Chargeback/Rates/Compute
Form: Add/Edit

current type: Ruby
API state:
MiqApi

PM Input: 2 - Medium

imported status: NOT ASSIGNED

Missing components:

• table with inputs

[skateman]

We could possibly implement this using a FieldArray and maybe a few custom components, but I'd rather work on the UX first and see what could be done here to have this nicely. cc @gtanzillo

[skateman]

https://www.manageiq.org/docs/reference/latest/api/reference/chargebacks_rates.html

PATCH/PUT: ManageIQ/manageiq-api#937