tcl_tests: Introduce new exitStatus -1 to ignore exit codes

tcl_tests: Introduce new exitStatus -1 to ignore exit codes

It's proposed[1] that crl and req change exit code making it unreliable for some
commands. Allow tests to ignore exit codes by specifying expected exit code `-1`.

This will also make such tests to always use regexp match mode.

Also, slightly fix the logic of applying regexp. Commentary says test
_parameter_ (`exitStatus`) 1 is used to trigger regexp matching but in fact
actual command exit code (`status`) 1 is used for that. This change did not
cause any test result difference.

Link: https://github.com/openssl/openssl/pull/23773
Signed-off-by: Vitaly Chikunov <vt@altlinux.org>