Doc : Add OpenEBS example

[lorellalou]

Thanks for taking the time to contribute to clickhouse-operator!

Please, read carefully instructions on how to make a Pull Request.

This will help a lot for maintainers to adopt your Pull Request.

Important items to consider before making a Pull Request

Please check items PR complies to:

• [x] All commits in the PR are squashed. More info
• [x] The PR is made into dedicated next-release branch, not into master branch¹. More info
• [x] The PR is signed. More info

--

¹ If you feel your PR does not affect any Go-code or any testable functionality (for example, PR contains docs only or supplementary materials), PR can be made into master branch, but it has to be confirmed by project's maintainer.

[Slach]

you just need proper base instead of master

[lorellalou]

@Slach sorry yes, I closed this to open another one properly based....

[Slach]

i changed the base, let's wait when e2e tests complete

[Slach]

@lorellalou could you sync your PR with 0.24.1 to re-run tests? something like that

git remove -v
git pull upstream 0.24.1 ?

or just something like "sync upstream" in github web interface

[lorellalou]

@Slach done.