[Feat] Develop ansible module for Virtual Switches under Networking namespace

[george-ghawali]

Add PC v4 virtual switch management modules:

• ntnx_virtual_switches_v2 — CRUD operations + migrate from existing bridge
• ntnx_virtual_switches_info_v2 — Read-only list/get

Requirements:

• Create, Update and Delete
• Migrate from existing bridge
• Get and List

Todo:

• Client SDK, get_spec()
• Ansible spec & spec validator
• Unit test, sanity test
• Integration test
• Documentation
• Examples