Remove local_ssd_count, and convert to ssd

[another-rex]

Works when running apply locally.

[michaelkedar]

Looking at the indexer kubernetes files in osv-config, I can't tell if the indexer was even using the local SSDs

[another-rex]

I think the ssd is mounted to /tmp, which is used to clone/copy the repositories that are being analysed.

[oliverchang]

Note that local SSDs are a fair bit faster than pd-ssd: https://cloud.google.com/compute/docs/disks#localssds

Does this have any performance implications for us?

[another-rex]

Ohh, I got mixed up persistent disks and local ssds mixed up.

@michaelkedar I see what you mean now, I don't see the configs using the local disk either. Maybe it automatically uses local ssds when they are available?

Does this have any performance implications for us?

Yes and no? This should be faster than what is currently being used (just standard persistent hard disks I believe, since no requests specifically for the ephemeral ssds), but we would probably get a speed boost by switching to using local ssds. I'll look into configuring it.