Add a fault injector simulating 'arbitration lost' from multi-master
setups. Read the docs for its usage.

A helper function for future fault injectors using SCL interrupts is
created to achieve this.
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>