[FSunstone] Add EFI firmware option

[vichansson]

Description

Add more firmware selection options to FSunstone under the VM Templates OS & CPU tab.

Use case

Select more firmware than just BIOS.

Interface Changes

Dropdown needs to include the same options as RSunstone.

Additional Context

FSunstone

RSunstone

Progress Status

• [ ] Code committed
• [ ] Testing - QA
• [ ] Documentation (Release notes - resolved issues, compatibility, known issues)