Fixes #31240 - New Host Registration Form (#8419)

Completely in React, with router & PF4 components
Divided into two tabs: General fields & Advanced Fields
Slots for extending form fields (general / advanced)
Form can be submitted only if there are no invalid fields

Related plugin extensions:
Katello/katello#9249
theforeman/foreman_remote_execution#574

Changes:

• Organization & Location can be changed in the Form
  changing ORG/LOC will fetch new data and reset form fields (HostGroup, OS & Smart Proxy)
  Reset of fields from plugins is handled by plugins.

• Host group
  If selected, following fields inherit the value from selected host group: Operating System, Activation Keys & Life Cycle Environment
  Selecting HG resets OS field

• Operating System
  When selected, show info about assigned host_init_config template.
  If template is not found, show error and block form

Setup Remote Execution & Setup Insights

• Yes/No value in default options Inherit from Host parameter is delivered from selected organization, location host group and operating system. The chain of getting value is:
  organization -> location -> operatingsystem -> hostgroup

• Packages (new field)
  Install packages after the host registration

• Repository & Repository GPG (new fields)

• Token Life Time
  Can be set to unlimited, otherwise value validated as: >= 1 && <= 999 999