Deploy VMs with gVNIC network interface

[steruck]

What would you like to be added: gVNIC is the next generation network interface which succeeds VirtIO. Newer machine series and networking features require gVNIC instead of VirtIO. Instance types that exclusively support gVNIC network interfaces such as h3-standard-88 already use gVNIC without explicit declaration.

gVNIC is supported and recommended on all machine families, machine types, and generations.

OS images need to support gVNIC, which GardenLinux and SUSE already do in newer versions. Preferred solution would be to auto-enable it based on the image capabilities.

Why is this needed:

• Provide better performance.
• Improve consistency by reducing noisy neighbor problems.
• Introduce new network functionality beyond what VirtIO is capable of.

https://cloud.google.com/compute/docs/networking/using-gvnic

[rishabh-11]

Grooming decision:-

We have assigned priority 4 to the issue. We will update the priority of it only if we see a pull for this use case.