test: fixing failing system_tests/run_command under some Locales

the run_command test under system_tests fails if the locale is anything
other than English ones because results such as "No such file or directory"
will be different under Non-English locales.

On the old version, a `ls nonexistingfile` was used to generate the error
output which is not ideal. In the current version we are using a Python one-liner
to generate a non 0 zero return value and "err" on stderr and check the
expected value against this.

fixes #30608

Github-Pull: #30788
Rebased-From: ae48a22a3df086fb59843b7b814619ed5df7557b

0 files changed, 0 insertions, 0 deletions