LU-16481 build: add server support for openEuler

LU-16481 build: add server support for openEuler

openEuer uses dnf as rpm pkg manager, it is somewhat like RHEL/Fedora.
The current openEuler LTS 22.03 kernel is based on Linux 5.10.0.

Ldiskfs patches based on ldiskfs-5.10.0-ml.series, different patches
compared with ldiskfs-5.10.0-ml.series are:
oe2203/ext4-misc.patch
oe2203/ext4-pdirop.patch
  use due to openEuler kernel backport new bugfixes and
  based on ldiskfs-5.14.21-sles15sp4.series
linux-5.16/ext4-inode-version.patch
ubuntu20.04.3/ext4-simple-blockalloc.patch
linux-5.14/ext4-xattr-disable-credits-check.patch
  use due to openEuler kernel backport new bugfixes.

This patch also fixes lbuild that no need a kernel config file for
patchless-server build. And add patched-server build needs an series
patches checking.

Test notes
----------
This patch is tested with below lbuild cmd:
../lustre-release/contrib/lbuild/lbuild --ccache
  --kerneldir=/home/openeuler/kernel-src-rpm/
  --kernelrpm=/home/openeuler/kernel-src-rpm/
  --lustre=/home/openeuler/lustre-release/lustre-2.15.54_1_xxx.tar.gz
  --patchless-server --disable-zfs
Note that, due to zfs openEuler build support patches[1] haven't been
backported to the stable release branch zfs-2.1-release and tag 2.1.5,
current lbuild doesn't support zfs rpms build for openEuler you need
to build zfs rpms in the zfs source code individually with cmd 'make
rpms'.
And until the openEuler gcc issue[2] is fixed, or you need to apply
Lustre rpm spec patch[3].
Until the openEuler kernel symbols providing issue[4] is fixed, or you
need to install kmod rpms with cmd 'sudo rpm -ivh --nodeps
./*.aarch64.rpm '
[1] https://github.com/openzfs/zfs/pulls?q=is%3Apr+is%3Aclosed+openeuler
[2] https://gitee.com/openeuler/gcc/issues/I5XMD0
[3] diff lustre.spec.in
...
-%define optflags -g -O2 -Werror
+%define optflags -g -O2 -Werror -Wno-stringop-overflow
[4] https://gitee.com/src-openeuler/kernel/issues/I6DQDX

Test-Parameters: trivial
Change-Id: Ie00e7d37ba3965e409b924109085a675bf3f7f4f
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49652
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>