Fix incorrect error report on vdev attach/replace

Report the correct error message in libzfs when attaching/replacing a
vdev with a higher ashift.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes #16449

lib/libzfs/libzfs_pool.c

@@ -3733,6 +3733,13 @@ zpool_vdev_attach(zpool_handle_t *zhp, const char *old_disk,
 			(void) zpool_standard_error(hdl, errno, errbuf);
 		}
 		break;
+
+	case ZFS_ERR_ASHIFT_MISMATCH:
+		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
+		    "The new device cannot have a higher alignment requirement "
+		    "than the top-level vdev."));
+		(void) zfs_error(hdl, EZFS_BADTARGET, errbuf);
+		break;
 	default:
 		(void) zpool_standard_error(hdl, errno, errbuf);
 	}