feat(networking): integrate autonat service to request if we are dialable

[alrevuelta]

Closes #1206

Summary:
This PR integrates the brand new AutonatService added in nim-libp2p. This service runs in the background asking other outbound connected peers to dial us, informing us if we are Reachable or NotReachable by them.

• Reachability state is logged every 2 minutes: Reachable/NotReachable.
• nim-libp2p metric can be reused. See:

libp2p_autonat_reachability_confidence{reachability="Reachable"} 1.0
libp2p_autonat_reachability_confidence{reachability="NotReachable"} 0.0

Done:

• Integrate autonatservice.
• Test Reachable state (opening ports)
• Test NotReeachable state (closing ports)

Note that this is an experimental feature that was never tested in nim-libp2p in a production environment, but it only impact logs and one metric, so its impact is really low.

[status-im-auto]

Jenkins Builds

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❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
❌	21c12b0	#1	2022-12-21 23:06:05	~18 min	macos	📄log
❌	027629e	#2	2022-12-22 23:00:58	~13 min	macos	📄log

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
❌	c9150ad	#3	2022-12-23 22:59:39	~12 min	macos	📄log
❌	33de5e6	#4	2023-01-03 22:52:05	~4 min	macos	📄log

[alrevuelta]

@jm-clius To be rebased on top of #1480 once merged. So disregard the nim-libp2p version bump.

[LNSD]

LGTM ✅

[jm-clius]

Thanks! Nice feature.