Figure out a better way to get notified of OOMs

[oliverchang]

The root cause of #1981 was that our exporter pod was OOMing. Unfortunately it looks like GKE does not give a good way to notify us when this happens. We should explore other options to make this more visible.

[github-actions]

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[github-actions]

This issue has not had any activity for 60 days and will be automatically closed in two weeks

See https://github.com/google/osv.dev/blob/master/CONTRIBUTING.md for how to contribute a PR if you're interested in helping out.