Migrate datatree imports to xarray

[mgrover1]

• xradar version: dev
• Python version: All
• Operating System: All

Description

With datatree being deprecated soon (moving into the core xarray library), we need to change any imports to pull from xarray instead of the xarray-datatree package

https://github.com/xarray-contrib/datatree

What I Did

I saw this on the xarray-datatree readme.

[zssherman]

@mgrover1 I can always tackle this, did you all want a try and except for backwards compatibility at the moment or straight to the new xarray import?

[kmuehlbauer]

Let's wait until this has settled in xarray finally. The process is currently ongoing. We should pin datatree to the last available version and make the move if datatree has landed as full class citizen in xarray

[zssherman]

Sounds good!

[mgrover1]

I agree with @kmuehlbauer here! Mainly just wanted to bring it to everyone's attention :)