LU-16802 build: compatibility for 6.4 kernels

LU-16802 build: compatibility for 6.4 kernels

linux kernel v6.3-rc4-32-g6eb203e1a868
  iov_iter: remove iov_iter_iovec()

Provide a replacement iov_iter_iovec() when one is not provided.

linux kernel v6.3-rc4-34-g747b1f65d39a
  iov_iter: overlay struct iovec and ubuf/len

This renames iov_iter member iov to __iov and provides the
iov_iter() accessor.
Define __iov as iov when __iov not present.
Provide an iov_iter() for older kernels.

linux kernel v6.3-rc1-13-g1aaba11da9aa
  driver core: class: remove module * from class_create()

Provide an ll_class_create() to pass THIS_MODULE, or not,
as needed by class_create().

Linux commit v6.2-rc1-20-gf861646a6562
  quota: port to mnt_idmap

Update osd_dquot_transfer to use mnt_idmap and fallback
to user_ns, if needed, by dquot_transfer.

Linux commit v6.3-rc7-2433-gcf64b9bce950
  SUNRPC: return proper error from get_expiry()

Updated get_expiry() requires a time64_t pointer to be passed
to hold the expiry time. A non-zero return value indicates an
error, nominally -EINVAL. Provide a wrapper for kernels that
return a time64_t and return -EINVAL on error.

Lustre-change: https://review.whamcloud.com/c/fs/lustre-release/+/50875
Lustre-commit: 2559c3a7a2c64b31baae1cba2ede6c4415ddc04d

Test-Parameters: trivial
HPE-bug-id: LUS-11614
Signed-off-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Change-Id: I765d6257eec8b5a9bf1bd5947f03370eb9df1625
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/53128
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>