fix: session close also should remove feeler dialing flag

[driftluo]

What problem does this PR solve?

dial command will reject by dialing feeler or session keep online

ckb/network/src/network.rs

Lines 332 to 334 in 5b44843

	let peer_in_registry = self.with_peer_registry(|reg| {
	reg.get_key_by_peer_id(peer_id).is_some() || reg.is_feeler(addr)
	});

dialing feeler flag will remove on feeler disconnected

ckb/network/src/protocols/feeler.rs

Lines 47 to 51 in 5b44843

	fn disconnected(&mut self, context: ProtocolContextMutRef) {
	let session = context.session;
	self.network_state.with_peer_registry_mut(|reg| {
	reg.remove_feeler(&session.address);
	});

But if the remote side turns off the protocol before local has opened it, the local's dialing feeler flag will not be cleared, also, this node can no longer be dial

why has such a delay on open protocol?

outbound: request open -> wait remote response -> open protocol
inbound: wait request -> send back response and open the protocol

There is a slight difference in the opening time of the two sides

Check List

Tests

• Unit test
• Integration test

Release note

None: Exclude this PR from the release note.

[yangby-cryptape]

• Before this PR, the integration test Discovery has 4% chance to be failed.
• After this PR, run the integration test Discovery more than 100 times without any errors.

[driftluo]

bors r=keroro520,yangby-cryptape

[bors]

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