Remove seed resolution validation

[rdettai]

Description

On ECS when using CloudMap the tasks register to the service DNS entries as they are started. This check might fail because the other peers haven't registered yet. But the the DNS-based discovery mechanism implemented in Chitchat would have built the cluster successfully.

How was this PR tested?

Describe how you tested this PR.

[rdettai]

What was the original reason for this check?

[guilload]

The check is here because downstream errors resulting from the inability to resolve peer seeds will not be as clear and easily understood. You will get metastore is unavailable or something like that, which can happen for a zillion reasons.

Please log a warning instead.

[rdettai]

We already have a warning for each unresolved host a few lines before:

quickwit/quickwit/quickwit-config/src/node_config/mod.rs

Lines 455 to 458 in d54479a

	if let Err(error) = peer_seed_addr.resolve().await {
	warn!(peer_seed = %peer_seed_addr, error = ?error, "failed to resolve peer seed address");
	continue;
	}

Do you want an extra one when none of the seed hostnames were resolved?

[guilload]

Yes.