Merge pull request #64830 from AliMasarweh/wip-alimasa-conditional

RGW | fix conditional MultiWrite

Reviewed-by: Casey Bodley <cbodley@redhat.com>

diff --cc src/rgw/driver/posix/rgw_sal_posix.h
Simple merge

diff --cc src/rgw/rgw_op.cc
Simple merge

diff --cc src/rgw/rgw_op.h
Simple merge

diff --cc src/rgw/rgw_rest_s3.cc
Simple merge

diff --cc src/rgw/rgw_sal.h
Simple merge