Add Infer to CI

Infer in general looks like it could be extremely useful: https://fbinfer.com/docs/getting-started

And they provide a Docker container: https://github.com/facebook/infer/tree/main/docker

There's also Infer:Pulse which looks really useful: https://fbinfer.com/docs/checker-pulse

Probably makes sense to add it to CI for boreutils.
