v1.18: pings received contact-infos on gossip socket address (backport of #1615)

[mergify]

Problem

bandwidth wasted on useless contact-infos.

Summary of Changes

ping received contact-infos on gossip socket address

---

This is an automatic backport of pull request #1615 done by Mergify.

[mergify]

Cherry-pick of 329a186 has failed:

On branch mergify/bp/v1.18/pr-1615
Your branch is up to date with 'origin/v1.18'.

You are currently cherry-picking commit 329a186c50.
  (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:   gossip/src/cluster_info.rs
	both modified:   gossip/src/legacy_contact_info.rs

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/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[t-nelson]

lgtm

[gregcusack]

Lgtm! Thanks Behzad!