[Thread] add an integration test case for NAT64
This CL adds an integration test case for NAT64. Because the feature is
not fully ready, we need some extra setup steps to make the feature
work. That is, specifying a CIDR for NAT64. Also, this test case is
based on `ot-ctl` but eventually the test should be based on API.
This CL requires https://github.com/openthread/openthread/pull/10566.
Bug: 356770473
Test: atest ThreadNetworkIntegrationTests
Change-Id: Idfb5ad848f7b2369591e47558ea67017c0b31e19
2 files changed