scripts: tests: twister_blackbox: Add test test_runner.py

- change name test_qemu.py to test_runner.py
- add test to test_runner.py:
  - build_only
  - runtest_only
  - ninja (dummy test)
  - dry_run (dummy test)
  - any_platform (dummy test)
  - cmake_only
  - pre_script (dummy test)
  - exclude_platform
  - device_flash_timeout (dummy test)
  - retry_failed
  - retry_interval
  - timeout_multiplier
  - quarantine_list
  - tag
  - only_failed
  - retry_build_errors

Made required changes to test_testplan.py tests

Signed-off-by: Paszkiet Kamil <kamilx.paszkiet@intel.com>