Fix: Adding missing @:DEALLOCATE's

[joshgillis]

Description

Added the two DEALLOCATE calls for Res_gs (line 105, within viscous if statement) and Gs_rs (line 111) needed in src/simulation/m_riemann_solvers.fpp

Closes #1568.

Type of change

• Bug fix

Testing

Ran test suite on personal machine using CPU for both --no-mpi and --mpi. Then ran test suite on Tuolumne in lustre5 storage, using ./mfc.sh test -j 16 --mpi --gpu acc -- -c tuo. All cases passed for all testing instances.

Checklist

Check these like this [x] to indicate which of the below applies.

• I added or updated tests for new behavior
• I updated documentation if user-facing behavior changed

See the developer guide for full coding standards.

GPU changes (expand if you modified src/simulation/)

• GPU results match CPU results
• Tested on NVIDIA GPU or AMD GPU

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.94%. Comparing base (ac5774e) to head (aba6cfb).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1592   +/-   ##
=======================================
  Coverage   60.94%   60.94%           
=======================================
  Files          82       82           
  Lines       19922    19922           
  Branches     2924     2924           
=======================================
  Hits        12141    12141           
  Misses       5805     5805           
  Partials     1976     1976           

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