Use simple folio migration function

Avoids using fallback_migrate_folio, which starts unnecessary writeback
(leading to BUG in migrate_folio_extra).

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: tstabrawa <59430211+tstabrawa@users.noreply.github.com>
Closes #16568
Closes #16723