scripts: tests: Blackbox test expension - disable

Add test related to disable-suite-name-check flag

This flag disabling extended test suite name verification at
the beginning of Ztest test. This option could be useful for tests
or platforms, which from some reasons cannot print early logs.

Add test related disable-warnings-as-errors

Do not treat warning conditions as errors.

Signed-off-by: Artur Wilczak <arturx.wilczak@intel.com>