Twister does not report qemu errors in all cases

[kuikka]

Describe the bug
When running tests using twister and qemu fails to start or crashes, it is reported as "Unknown" reason instead of return value from qemu.

Example:
In this case my system does not have qemu installed for cortex_a9 so this test will fail to run, but the produced error is not helpful for debugging the reason.

Commandline: ./scripts/twister -T tests/subsys/shell/shell_history -p qemu_cortex_a9

Pertinent output:

qemu_cortex_a9            tests/subsys/shell/shell_history/shell.history      FAILED : Unknown
see: /Users/kuikka/zephyrproject/zephyr/twister-out/qemu_cortex_a9/tests/subsys/shell/shell_history/shell.history/build.log
INFO    - Total complete:    1/   1  100%  skipped:    0, failed:    1, error:    0

To Reproduce
Steps to reproduce the behavior:
Version: 34c84ec

1. Assume qemu for arm cortex a9 is not available
2. ./scripts/twister -T tests/subsys/shell/shell_history -p qemu_cortex_a9

Expected behavior

qemu_cortex_a9            tests/subsys/shell/shell_history/shell.history      FAILED : Exited with 1

Impact
Annoying and makes debugging tests in CI difficult due to not all information being captured in logs.

Tasks

Beta Give feedback

1. Do not set reason early as handler code won't replace it #72996
   Trivial area: Twister +2
   

[kuikka]

#72996 Fixes this issue for me but further thoughts may be needed as I'm not sure this works in all cases.

[kuikka]

My commit was accepted so closing this.