ci: bump golangci-lint to v1.44, golangci-lint-action to v3

[kolyshkin]

and format sources using gofumpt 0.2.1 (which is uncluded to that golangci-lint version).

[thaJeztah]

LGTM

[AkihiroSuda]

gofumpt seems too much nitpicky.
Can we just disable it?

[thaJeztah]

Overall, I like the formatting that gofumpt makes (most of them would be what I would do myself, but of course that may be preferential).

The change it makes in update.go and devicefilter_test.go feel like improvements to me (less cluttered, and in the latter case definitely less confusing). I'm less "convinced" about the change in process_linux.go (although it points out that interface methods were not documented (and probably should've been; even if not exported)).

I do agree though (hope!) that it won't change too much over time, and stabilizes to prevent too much code-churn.

Alternatively, we could periodically do a round of gofumpt updates (and group them together); not sure if that would be more disruptive though.

[kolyshkin]

I agree that gofumpt is more opinionated that gofmt but so far I like all the changes it did.

I also understand that having gofumpt in linters raises the barrier to new runc contributors, as (unlike gofmt) it's a non-standard tool, and it also may create a nuisance for the seasoned contributors. Again, I think, the nice changes it makes outweight it (so far).

We can certainly stop using it if it ever becomes too opinionated/nitpicky (or we can talk to its author), but so far, in my opinion, it hasn't happen -- all these changes are for good.

[kolyshkin]

gofumpt seems too much nitpicky.

I bet you haven't seen wsl linter yet 🤣

[kolyshkin]

So, due to my bad memory I ended up reimplementing this today, to find out I did that once already.

I have cleaned up the last commit a bit, and added one more to prepare for golangci/golangci-lint-action#403 (so that #3397 will succeed, once rebased on top of this one).

Can we please have this merged? @opencontainers/runc-maintainers @AkihiroSuda PTAL

[thaJeztah]

LGTM