scsi: core: make fair tag sharing configurable via sysfs

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8RGGC
CVE: NA

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Add a sysfs attribute to SCSI hosts for configuring fair tag sharing.

Originally-from: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/all/20231130193139.880955-4-bvanassche@acm.org/


Signed-off-by: Yu Kuai <yukuai3@huawei.com>