Add support for clustered and stacked devices

[alhogan]

Environment

• Nautobot version: 3.11
• nautobot-device-onboarding version: 4.0.1

Proposed Functionality

When onboarding a logical device that is made up of more than 1 physical devices, onboard all physical devices with a best effort approach.

Use Case

• Clustered Juniper SRX or Cisco Firepower/ASA Firewalls
• Switch Stacks

[alhogan]

Clustered devices are probably easier than stacked switches. The current commands for Juniper SRXs pull the info for each physical device already. For example "show version | display json" when parsed will return [ "device1", "device2" ] and currently the plugin just takes the first entry, but it could loop through the entries instead.