tests/int: use run -N|! for runc

[kolyshkin]

This is the second part of tests/integration cleanup I wanted to do for quite some time.
For the first part, see #4945.

1. Improve runc wrapper

   1. Add status check support (same as in bats' run helper).

   2. Add PRE_CMD support (so we can use commands like taskset or timeout).

   3. Drop sane_helper since the output of the command is shown in case of
      an error, and we show the command itself in runc wrapper (unless -N
      or ! is provided -- in this case the command is shown by bats,
      together with the error). This does not show the output of successful
      commands which IMO is a net positive since we are almost always
      interested in failed command output only.

   4. Use the new functionality in cpu_affinity.bats and start.bats as a
      showcase (the test of refactoring is in a separate commit).

2. refactor to use runc status checks

3. add missing runc status checks

[kolyshkin]

CI failure in almalinux9 is a known flake #4437. Restarted.

[kolyshkin]

Now we do:

runc start foo
[ $status -eq 0 ]

and runc hides a call to run.

With this PR, we now do

runc -0 start foo

I.e. we still hide run inside but allow runc to accept some of run options (-N and ! for now).

The alternative to that is use run explicitly:

run -0 runc start foo

I am open to any suggestions.