[12.0][FIX] account_move_multi_company: call super().post() with invoice as keyword

[HviorForgeFlow]

Summary

• `super().post(invoice)` forwards the optional `invoice` argument positionally.
• That only works by coincidence when every class in `account.move`'s MRO also declares `invoice` as a plain positional-or-keyword parameter - a downstream consumer (hobbii) hit a `TypeError: post() takes 1 positional argument but 2 were given` while investigating this exact chain.
• Pass it by keyword instead, matching the module's own declared signature (`post(self, invoice=False)`).