Add openEuler 22.03 support

[raulillo82]

WARNING

Salt bundle did not work out of the box and some adjustments were needed. @vzhestkov took care of that, so please check with him and do not merge until his changes are ready for the bundle.

The following rpm as a PoC was used, and is the one that hopefully will be merged soon: https://download.opensuse.org/repositories/home:/vzhestkov:/saltstack:/bundle:/next/AlmaLinux_8/

What does this PR change?

Add Openeuler 22.03

GUI diff

No difference.

• DONE

Documentation

• Documentation issue was created: Yes, see Add documentation for openEuler clients uyuni-docs#1636

• DONE

Test coverage

• Cucumber tests to be added later

• DONE

Links

Implements #4000

• DONE

Changelogs

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[meaksh]

Thanks for the changes @raulillo82 ! I would like to clarify something

[meaksh]

I noticed some typo and also added some minor comments. Thanks!

[meaksh]

LGTM, thanks!