UPSTREAM: block: Add a public bdev_zone_is_seq() helper

Turn the private disk_zone_is_conv() function in blk-zoned.c into a
public and documented bdev_zone_is_seq() helper with the inverse
polarity of the original function, also adding a check for non-zoned
devices so that all file systems can use the helper, even with a regular
block device.

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20241107064300.227731-3-dlemoal@kernel.org


Signed-off-by: Jens Axboe <axboe@kernel.dk>
Bug: 234829282
Change-Id: Ib2984d8e45b391589f1b724173d2b0d886fa57c4
(cherry picked from commit f3d9bf05)
Signed-off-by: Bart Van Assche <bvanassche@google.com>