Changes

testenv: add run --until-nok

Add an argument to run a specific test (if using --test) or a whole
testsuite until it fails with "failure" or "error". This helped me in
reproducing a race condition in the mgw testsuite (related issue).

Related: OS#3849
Change-Id: I17e1ebcc5d6ff1b6a087c4d4c9405a02798212f1

mgw: fix RTP packets received while RX disabled

Fix the race condition causing tests to abort with:
  1 RTP packets received while RX was disabled

Fixes: OS#3849
Change-Id: Ieaf5440a693448cdeeaac7f47e6110cb480bff5f

testenv: make it pass 'ruff check' linter

I've added 'ruff check' to my pre-commit script. Make it pass initially,
so it can detect future bugs. The missing f-string is a bug that causes
ggsn testsuites with a custom kernel path to not work.

Change-Id: I3e5cd05ce0aa241509d77391c5ed64e618f385ba

testenv: install dbg pkgs with --binary-repo too

When using --binary-repo, figure out the -dbg and -dbgsym packages for
all dependencies of packages to be installed, and install them as well.

This will make debug symbols available in jenkins, useful for the
related issue. Before this patch debug symbols were only available when
building locally without --binary-repo.

Related: OS#6630
Change-Id: I4dc57257b944126fed2c7b031c92c77a3d4286e0