OEM error handling from config

[rumpelsepp]

If an invalid OEM in the config is set, than no error is logged.

/cc @peckto @VeroSec

[rumpelsepp]

@peckto @VeroSec Do you have a reproducer for this? I am not sure how this bug is triggered:

gallia/src/gallia/plugins.py

Lines 43 to 56 in 96c717d

	def load_ecu(vendor: str) -> type[ECU]:
	"""Selects an ecu class depending on a vendor string.
	The lookup is performed in builtin ecus and all
	classes behind the ``gallia_uds_ecus`` entry_point.
	The vendor string ``default`` selects a generic ECU.
	"""
	if vendor == "default":
	return ECU
	for ecu in load_ecu_plugins():
	if vendor == ecu.OEM:
	return ecu
	raise ValueError(f"no such OEM: '{vendor}'")