Stack size might be too small when running the test in real
board like sam-e70.
Fixes#19914
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Make sure net-shell is started properly and it does not crash.
The purpose of this test is to catch issues described in #19178
where UART was not working which was seen as net-shell crashing
at startup.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
