block: Introduce op_needs_zoned_write_locking()

Introduce a helper function for checking whether write serialization is
required if the operation will be sent to a zoned device. A second caller
for op_needs_zoned_write_locking() will be introduced in the next patch
in this series.

Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230517174230.897144-5-bvanassche@acm.org


Signed-off-by: Jens Axboe <axboe@kernel.dk>