openQA "t" tests time out (again) and take long
Checks in https://github.com/os-autoinst/openQA/pull/3519 and other PRs time out even for completely unrelated changes. Also "t" take rather long, e.g. 35 minutes, especially due to some long-running test modules.
For example t/44-scripts.t timed out in
- AC1: "t" does not take significantly longer than the other steps of the circle CI pipeline (or significantly less than currently)
- AC2: tests in "t" are a bit more reliable again (as in past months)
- Try to split tests differently in .circleci/config and Makefile
- Bump timeout for tests that timeout