twister: add an explicit path before import Domains

This is line is breaking in some CI setups since the recent ruff fixup
with:

ModuleNotFoundError: No module named 'domains'

Try and fixit by explicitly adding the path before the include, all
other instances have it already.

Signed-off-by: Fabio Baltieri <[email protected]>

scripts/pylib/twister/twisterlib/runner.py

@@ -23,7 +23,10 @@
 import elftools
 import yaml
 from colorama import Fore
+
+sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/pylib/build_helpers"))
 from domains import Domains
+
 from elftools.elf.elffile import ELFFile
 from elftools.elf.sections import SymbolTableSection
 from packaging import version