LU-12885 mds: add enums for MDS_OPEN flags (4/4)

LU-12885 mds: add enums for MDS_OPEN flags (4/4)

This patch is fourth of the series of patch that separates
kernel open flags from MDS open flags

This patch adds function ll_kernel_to_mds_open_flags() for
one place convert of kernel flags (fmode) to MDS flags

This patch removes macros O_LOV_DELAY_CREATE_1_8 and
O_LOV_DELAY_CREATE_MASK everywhere as it is was only
required for interop with applications written for Lustre
1.8 clients and not used any more

This patch adds function ll_lov_delay_create_is_set() and
ll_lov_delay_create_clear() to set and remove O_LOV_DELAY_CREATE
flag if found in struct file->fmode

This patch removes remaining fmode to mds_open_flags wherever
it was remaining

Signed-off-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Change-Id: Ic125dc0c7fa54888fddf435c117de9d304ea8708
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/56812
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>