Twister logging on stderr caused exception on non-UTF8 encoding

[dtquang89]

https://github.com/zephyrproject-rtos/zephyr/blob/main/scripts/pylib/twister/twisterlib/handlers.py#L814

While working on twister test on hardware using OpenOCD, I encounter the exception while twister logging the stderr from OpenOCD output with non-UTF8 encoding.

Would it be possible to change it to add parameter to ignore the error. That is: dlog_fp.write(stderr.decode(errors="ignore"))?

Error:
Error: b'TARGET: riscv - Not halted\n\xefshutdown command invoked\n'
ERROR - General exception: 'utf-8' codec can't decode byte 0xef in position 819: invalid continuation byte