[Feature]: Support more CPU-only machine types on GCP

[colinjc]

Problem

When working on ML projects we don't always need GPUs, but want to use the same tooling for CPU-only workflows. dstack currently only supports e2 machines on GCP, it should also support all CPU machines types to enable this.

N4, C4, C3, H3, N2, E2

Solution

No response

Workaround

No response

Would you like to help us implement this feature by sending a PR?

Yes

[r4victor]

Looked up what we need to support the new machine series:

The latest series (N4, C4, M4) do not support Persistent disks but only Hyperdisk. So we'll need to use Hyperdisk for the boot disk with them. Also, volumes won't work since they currently use Persistent disks. Requires #2588 to support volumes for newer series. The current dstack VM image works, so it doesn't need to be updated.