fix(kafka sink): add panic on Fatal error received from `librdkafka`

[Ilmarii]

This is my attempt to fix #14290. The fatal error is unrecoverable and requires the librdkafka producer to be reinitialized. I think failing fast is a good solution in this situation. So, just panic and let the vector restart after that.

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[bruceg]

Closing this as this is not the approach we would need to take to solve the problem and there has been no further changes to move towards that.