The DNS-SD Resolve callback logic must be executed in the Matter task context

[selissia]

Problem

In the current implementation of a Matter node running over Thread a successful DNS-SD resolution can result in CASE session establishment code to be executed in the Thread task context (see attached stack trace). This is problematic as the Tread task is not generally expected to have sufficient stack to handle Matter processing. Another issue is that this may result in a semaphore block during an attempt to send a Thread message from the context of receiving a Thread message.

More info in this discussion thread: https://csamembers.slack.com/archives/G014G30SVV0/p1640643472300200

Proposed Solution

The Matter processing resulting from OnDnsResolveResult
(and probably other DNS-SD events) must be handed off to the Matter processing context.

Stack:

[doru91]

Always reproductible on NXP platform. Also left a comment in the Slack thread.