Create CI test for node-local-dns with LRP

[Weil0ng]

This is a follow up item from #24230 , we need to add a CI test to cover node-local-dns use case, need to check:

• DNS traffic correctly hits node-cache (incrementing its counter) and getting resolved
• Traffic between client pod and node-cache is NOT tracked in kernel conntrack table

[aditighag]

Slack messages roll over, so copy pasting the messages here -

We can add a new test to the suite in cilium-cli - https://github.com/cilium/cilium-cli/tree/main/connectivity/tests. We could use the same test pods deployed in the guide. We would have to add the lrp feature flag detection - https://github.com/cilium/cilium-cli/blob/main/connectivity/check/features.go.

@Weil0ng We discussed having a plan of action on the original linked PR - #24230 (comment). Given the PR was merged with the expectation that we'll add CI coverage in 1.14. Feel free to follow-up on the Slack thread or here in case you have any questions regarding the test framework before getting started.