Update iBGP, eBGP, and External Fabric Modules to Use FabricBaseModel (NDA-23)

[mtarking]

New module/feature description:

Create an abstract `class FabricBaseModel(NDBaseModel)` that includes fabric name, location, license, telemetry, etc.

Update existing modules, e.g.

`class FabricIbgpModel(FabricBaseModel):`

Which resource area of Cisco Nexus Dashboard does this new feature belong to?

manage

New or Affected Documentation for New Feature

Potential Ansible Task Config

N/A

Ansible Version

Ansible Collection Versions

Cisco Nexus Dashboard Version

4.2.1

Cisco NX-OS Version

Cisco ACI Version