HDDS-3805. [OFS] Remove usage of OzoneClientAdapter interface

[smengcl]

3rd time's the charm

What changes were proposed in this pull request?

Use ClientProtocol directly in Adapter and FS. Completely remove the usage of OzoneClientAdapter interface in OFS.

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-3805

How was this patch tested?

All existing UTs/robots should pass as-is.

What is the difference of this PR since #1363?

1. Rebased to the latest master branch
2. Renamed internal class BasicRootedOzoneClientAdapterImpl to BasicRootedOzoneFileSystemHelper as suggested.

[elek]

Sorry for the late review @smengcl, and thanks for the patch. The concept looks good to me.

In fact, I am very interested about the mentioned future:

 * Previously BasicRootedOzoneClientAdapterImpl. Might be merged with
 * BasicRootedOzoneFileSystem in the future.

But it seems to be a reasonable step forward to it.

As far as I see it has never been passed the CI, would be great to get a green build...

[elek]

/pending As far as I see it has never been passed the CI, would be great to get a green build...

[github-actions]

Marking this issue as un-mergeable as requested.

Please use /ready comment when it's resolved.

Please note that the PR will be closed after 21 days of inactivity from now. (But can be re-opened anytime later...)

As far as I see it has never been passed the CI, would be great to get a green build...

[github-actions]

Thank you very much for the patch. I am closing this PR temporarily as there was no activity recently and it is waiting for response from its author.

It doesn't mean that this PR is not important or ignored: feel free to reopen the PR at any time.

It only means that attention of committers is not required. We prefer to keep the review queue clean. This ensures PRs in need of review are more visible, which results in faster feedback for all PRs.

If you need ANY help to finish this PR, please contact the community on the mailing list or the slack channel."