fio: add support for POSIX_FADV_NOREUSE

fio: add support for POSIX_FADV_NOREUSE

As of Linux kernel commit 17e810229cb3 ("mm: support
POSIX_FADV_NOREUSE"), POSIX_FADV_NOREUSE hints at the LRU algorithm to
ignore accesses to mapped files with this flag. Previously, it was a
no-op.

Add it in fio as an fadvise_hint option to test the new behavior.

Signed-off-by: Yuanchu Xie <yuanchu@google.com>
Link: https://lore.kernel.org/r/20230331183703.3145788-1-yuanchu@google.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>