Merge: Revert "io_uring/uring_cmd: defer SQE copying until it's needed"

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/merge_requests/594

JIRA: https://issues.redhat.com/browse/RHEL-82698


CVE: CVE-2025-21837

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>

Approved-by: Ewan D. Milne <emilne@redhat.com>
Approved-by: Brian Foster <bfoster@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Julio Faracco <jfaracco@redhat.com>