Race condition in MongoCluster when using lazy connection to SRV hostname

[Obbut]

Describe the bug

In MongoCluster, resolving of SRV hostnames is kicked off in .init(lazyConnectingTo:logger:eventLoopGroup:). This happens in asynchronously in a task:

MongoKitten/Sources/MongoClient/Cluster.swift

Lines 167 to 172 in 0ca7b30

	Task {
	// Kick off the connection process
	try await resolveSettings()
	scheduleDiscovery()
	}

Because the result of this (which happens in resolveSettings) is not awaited before creating connections, a race condition exists: connections that are lazily created before the hostname resolution is complete, will connect to the wrong hostname.