Dmitriy Kruglov

@fruch This change adds the underlying mechanism for skipping test stages, and uses it in longevity tests to mark the appropriate test stage methods/calls. I suggest to have a separate...

> I think one of the main use cases for this are perf regression tests where we play with load a lot and want to skip preloading data. Please check...

Bad copy-n-paste., updated it.

> Did you faced out similar problem recently? As Valerii mentioned the lag between nemeses can be observed here and there. But as it was explained it is probably expected,...

Not sure why it failed, but the fail in unit tests is not related to this change.

@fruch As we discussed, when a cluster is deployed without `test_communication_public.yaml` config it is not possible to get to DB nodes from local dev machine. So added in this PR...

> @dimakr any more things to check/fix here? Or we merge it? Yes, do not merge it yet please. I've noticed that somewhere between changes setting the proxy_cmd param for...

@soyacz added the missed parameter in CommandRunner._make_ssh_command method (otherwise sending new packages to DB nodes via rsync would fail in some conditions). Re-executed checks to test the changes: - new...

> Why do you think it's SCT issue instead of Scylladb? I was led by example of how the same issue/symptoms was reported in the past for K8S related config...

The issue repeated again in 2024.1.11 - [longevity-mv-si-4days-test](https://argus.scylladb.com/test/8d7705a3-b3b8-4abd-b0e2-a0e6938c1e15/runs?additionalRuns[]=8a8bfd56-5065-4f0c-ae80-7cde6a538469). As per system.log of the target node-7 the pattern that the `disrupt_resetlocalschema` is waiting for appeared as expected - within the 30s...