vhotplug: Add vendor specific ethernet adapter support

[vunnyso]

Description of changes

Adding support for UE306 Ethernet Network Adapter which has vendor specific interface and does not have bInterfaceClass as Communications (2) and bInterfaceSubClass as "Ethernet Networking" (6) defined in "Configuration Descriptor" space.

Closes: #6168

Checklist for things done

• Summary of the proposed changes in the PR description
• More detailed description in the commit message(s)
• Commits are squashed into relevant entities - avoid a lot of minimal dev time commits in the PR
• Contribution guidelines followed
• Ghaf documentation updated with the commit - https://tiiuae.github.io/ghaf/
• PR linked to architecture documentation and requirement(s) (ticket id)
• Test procedure described (or includes tests). Select one or more:
  • Tested on Lenovo X1 x86_64
  • Tested on Jetson Orin NX or AGX aarch64
  • Tested on Polarfire riscv64
• Author has run make-checks and it passes
• All automatic Github Action checks pass - see actions
• Author has added reviewers and removed PR draft status
• Change requires full re-installation
• Change can be updated with nixos-rebuild ... switch

Instructions for Testing

• List all targets that this applies to:
• Is this a new feature
  • List the test steps to verify:
• If it is an improvement how does it impact existing functionality?
  i) Should fix Ethernet adapter not working in Net-VM

[nesteroff]

Nice catch on the typos! It means that previously entire device classes were passed to VMs. Now they should be passed only when both the class and subclass match.