Proxmox using 2 CPU and 2 sockets in stead of 4 CPU and 1 socket?

## Environment

- **Make target:** `make proxmox`
- **Run using container image? (Y/N):** Y
- **Environment vars:**
```

```
- **Vars file:**
```

```

## What steps did you take and what happened?
The VM that is created in proxmox has 2 CPU's and 2 sockets.

## What did you expect to happen?
4 CPU's and 1 socket.

## Relevant log output

Log Output

```

```

## Anything else you would like to add?
Is there a reason that it uses 2 sockets? Otherwise I'll create a PR for 1 socket and 4 CPU's!

Thank you.

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/kind bug

Start with the `make proxmox` target and trace how the Proxmox VM CPU and socket settings are produced. Reproduce the issue with the container image and inspect the resulting VM configuration. Done means the created VM uses 4 CPUs and 1 socket, with the existing behavior and any relevant tests updated accordingly.

Written by the indexing model from the issue text.