Fixing Cubed Sphere Scalar Tracer

[cshsgy]

• Fixed cubed sphere tracer transport communication issues
• Turned off the decomposition for scalars but kept on for hydro variables

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.17%. Comparing base (5c04146) to head (b8990d1).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #164 +/- ## ======================================= Coverage 99.17% 99.17% ======================================= Files 31 31 Lines 1574 1574 ======================================= Hits 1561 1561 Misses 13 13 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.