HDDS-6869. Use UGI when checking Upgrade priv

[kerneltime]

What changes were proposed in this pull request?

When checking for admin privileges in the OM Upgrade path, the check is
only run against the short name representation of the UGI. The check
should be done against variations of the user name. Ideally, the check
should be against UGI Objects but the admin list created also takes in a
string representation of the user name via config.

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-6869

How was this patch tested?

Local secure cluster with an upgrade finalization test.

[errose28]

Thanks for the fix @kerneltime. We will also need to do this in OzoneManagerStateMachine#preAppendTransaction, which is where the prepare request is checked for admin privileges since it will start blocking log entries there. We should probably add an admin check for OzoneManager#queryUpgradeFinalizationProgress as well.

[kerneltime]

Thanks for the fix @kerneltime. We will also need to do this in OzoneManagerStateMachine#preAppendTransaction, which is where the prepare request is checked for admin privileges since it will start blocking log entries there. We should probably add an admin check for OzoneManager#queryUpgradeFinalizationProgress as well.

Fixing those in https://issues.apache.org/jira/browse/HDDS-6870
To keep cherry-picking simple and fixing this in a targetted manner keeping them separate.

[errose28]

Thanks for the fix @kerneltime. I will follow #3503 for the next round of updates.