物理机节点升级后，/boot/efi/目录下为空

【问题复现步骤】
物理机节点（UEFI）升级后，再次升级

【预期结果】
再次升级成功

【实际结果】
再次升级失败：
```
Aug 24 12:28:42 node5 os-agent[1157]: time="2022-08-24T12:28:42Z" level=error msg="update error fail to run command:grub2-editenv [/boot/efi/EFI/openEuler/grubenv set saved_entry=A] out:grub2-editenv: error: cannot open `/boot/efi/EFI/openEuler/grubenv.new': No such file or directory.\n err:exit status 1"
Aug 24 12:28:42 node5 os-agent[1157]: time="2022-08-24T12:28:42Z" level=info msg="start to update to KubeOS EulerOS_X86_2209LTS_test_dc_2"
Aug 24 12:28:42 node5 os-agent[1157]: time="2022-08-24T12:28:42Z" level=info msg="start pull rnd-dockerhub.huawei.com/official/kubeos_euleros_x86_2209lts_test_dc_2:1.0"
Aug 24 12:28:46 node5 os-agent[1157]: time="2022-08-24T12:28:46Z" level=info msg="downloading to file /persist/update.img"
Aug 24 12:28:52 node5 os-agent[1157]: time="2022-08-24T12:28:52Z" level=info msg="/dev/sda2 mounted on "
Aug 24 12:28:52 node5 os-agent[1157]: time="2022-08-24T12:28:52Z" level=info msg="side is /dev/sda2"
Aug 24 12:29:00 node5 os-agent[1157]: time="2022-08-24T12:29:00Z" level=error msg="update error fail to run command:grub2-editenv [/boot/efi/EFI/openEuler/grubenv set saved_entry=A] out:grub2-editenv: error: cannot open `/boot/efi/EFI/openEuler/grubenv.new': No such file or directory.\n err:exit status 1"
Aug 24 12:29:00 node5 os-agent[1157]: time="2022-08-24T12:29:00Z" level=info msg="start to update to KubeOS EulerOS_X86_2209LTS_test_dc_2"
Aug 24 12:29:00 node5 os-agent[1157]: time="2022-08-24T12:29:00Z" level=info msg="start pull rnd-dockerhub.huawei.com/official/kubeos_euleros_x86_2209lts_test_dc_2:1.0"
Aug 24 12:29:04 node5 os-agent[1157]: time="2022-08-24T12:29:04Z" level=info msg="downloading to file /persist/update.img"
Aug 24 12:29:10 node5 os-agent[1157]: time="2022-08-24T12:29:10Z" level=info msg="/dev/sda2 mounted on "
Aug 24 12:29:10 node5 os-agent[1157]: time="2022-08-24T12:29:10Z" level=info msg="side is /dev/sda2"
Aug 24 12:29:17 node5 os-agent[1157]: time="2022-08-24T12:29:17Z" level=error msg="update error fail to run command:grub2-editenv [/boot/efi/EFI/openEuler/grubenv set saved_entry=A] out:grub2-editenv: error: cannot open `/boot/efi/EFI/openEuler/grubenv.new': No such file or directory.\n err:exit status 1"
Aug 24 12:29:18 node5 os-agent[1157]: time="2022-08-24T12:29:18Z" level=info msg="start to update to KubeOS EulerOS_X86_2209LTS_test_dc_2"
Aug 24 12:29:18 node5 os-agent[1157]: time="2022-08-24T12:29:18Z" level=info msg="start pull rnd-dockerhub.huawei.com/official/kubeos_euleros_x86_2209lts_test_dc_2:1.0"
Aug 24 12:29:22 node5 os-agent[1157]: time="2022-08-24T12:29:22Z" level=info msg="downloading to file /persist/update.img"
Aug 24 12:29:29 node5 os-agent[1157]: time="2022-08-24T12:29:29Z" level=info msg="/dev/sda2 mounted on "
Aug 24 12:29:29 node5 os-agent[1157]: time="2022-08-24T12:29:29Z" level=info msg="side is /dev/sda2"
```
挂载信息：
```
[root@node5 ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
sda      8:0    0  1.1T  0 disk 
|-sda1   8:1    0   94M  0 part 
|-sda2   8:2    0  2.3G  0 part 
|-sda3   8:3    0  2.3G  0 part /
`-sda4   8:4    0  1.1T  0 part 
sdb      8:16   0  7.3T  0 disk 
|-sdb1   8:17   0   94M  0 part /boot/efi
|-sdb2   8:18   0  2.3G  0 part 
|-sdb3   8:19   0  2.3G  0 part 
`-sdb4   8:20   0  7.3T  0 part /var/lib/kubelet
                                /var/lib/docker
                                /var
                                /persist
[root@node5 ~]# mount -o remount,rw /
[root@node5 ~]# mkdir aaa
[root@node5 ~]# mount /dev/sda1 aaa
[root@node5 ~]# ll aaa
total 2
drwxr-xr-x 4 root root 2048 Aug 24 06:40 EFI
[root@node5 ~]# ll aaa/EFI/
BOOT/      openEuler/ 
[root@node5 ~]# ll aaa/EFI/BOOT/            
total 232
-rwxr-xr-x 1 root root 237568 Aug 24 11:59 BOOTX64.EFI
[root@node5 ~]# ll aaa/EFI/openEuler/
total 1872
drwxr-xr-x 2 root root    2048 Jul 23 00:00 fonts
-rwxr-xr-x 1 root root    5720 Aug 24 11:59 grub.cfg
-rwxr-xr-x 1 root root    1024 Aug 24 12:12 grubenv
-rwxr-xr-x 1 root root 1646592 Jul 23 00:00 grubia32.efi
-rwxr-xr-x 1 root root  237568 Aug 24 11:59 grubx64.efi
drwxr-xr-x 2 root root   22528 Aug 24 11:59 x86_64-efi
```
PXE直接安装的环境挂载信息：
```
[root@localhost ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        4.0M     0  4.0M   0% /dev
tmpfs           378G     0  378G   0% /dev/shm
tmpfs           151G   34M  151G   1% /run
tmpfs           4.0M     0  4.0M   0% /sys/fs/cgroup
/dev/sda2       2.3G  1.4G  738M  66% /
/dev/sda1        94M   11M   84M  11% /boot/efi
/dev/sda4       1.1T   14M  1.1T   1% /persist
tmpfs           378G     0  378G   0% /tmp
overlay         1.1T   14M  1.1T   1% /etc
[root@localhost ~]# ll /boot/efi/EFI/  
total 4
drwxr-xr-x 2 root root 2048 Aug 24 12:51 BOOT
drwxr-xr-x 4 root root 2048 Aug 24 12:51 openEuler
[root@localhost ~]# ll /boot/efi/EFI/openEuler/
total 1870
drwxr-xr-x 2 root root    2048 Jul 23 00:00 fonts
-rwxr-xr-x 1 root root    5720 Aug 24 12:51 grub.cfg
-rwxr-xr-x 1 root root 1646592 Jul 23 00:00 grubia32.efi
-rwxr-xr-x 1 root root  237568 Aug 24 12:51 grubx64.efi
drwxr-xr-x 2 root root   22528 Aug 24 12:51 x86_64-efi
```

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