Merge PR #23055 into luminous

Merge PR #23055 into luminous

* refs/pull/23055/head:
	common/options: disable osd_skip_data_digest
	common/options: make osd_skip_data_digest a DEV option
	common: add osd_distrust_data_digest option
	osd: apply osd_skip_data_digest to read operations
	osd: do not skip_data_digests during scrub
	osd/PrimaryLogPG: use legacy style for osd_skip_data_digest

Reviewed-by: Kefu Chai <kchai@redhat.com>
Reviewed-by: Josh Durgin <jdurgin@redhat.com>
Reviewed-by: Greg Farnum <gfarnum@redhat.com>