[BP: v6 <- #686] Bump github.com/libp2p/go-libp2p from 0.22.0 to 0.27.8

[mergify]

This is an automatic backport of pull request #686 done by Mergify.
Cherry-pick of 0161404 has failed:

On branch mergify/bp/v6/pr-686
Your branch is up to date with 'origin/v6'.

You are currently cherry-picking commit 0161404.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   go.mod
	both modified:   go.sum

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[boojamya]

Now I remember why we don't use mergify to backport dependancies.