[CI/task/bug] GHA check job misconfiguration

[webknjaz]

As it is configured now, the test-summary job will always pass in the branch protection rules because it'll either be green (success) or gray (skip — this happens when the tests fail) which is ultimately interpreted as “not failing”.

The fix is easy — use if: always(). And it's better to use https://github.com/re-actors/alls-green, since all the detection logic is generalized well there.