Investigate stall behavior in mww3_test_02 regtest using SCRIP

[MatthewMasarik-NOAA]

Describe the bug
Regtest mww3_test_02 using switch PR3_UNO_MPI_SCRIP stalls during grid sweep. The execution will appear to hang, but at some point silently fail and move on to the next step of the regtest and is not caught by the matrix.comp.

To Reproduce
./bin/run_cmake_test -b slurm -o all -S -T -s PR3_UNO_MPI_SCRIP -w work_PR3_UNO_MPI_c_c -m grds\ et_c -g curv -f -p srun -n 24 ../model mww3_test_02

Expected behavior
The regtest will progress successfully into the SCRIP processing where the integration will then stall during a grid sweep.

Screenshots

 SI nbPlus=        7396  nbMinus=           0  nbZero=           0
 SI nbPlus=        7396  nbMinus=           0  nbZero=           0
  
 Grid 1 size        3721
 Grid 2 size        1849
 
 grid1 sweep
 grid2 sweep 
 integration stalled: num_subseg exceeded limit
 Cell         1625
 Edge            2
 Grid            1
 Fraction of segment left   0.599999988869029    
    .
    .
 Fraction of segment left   0.599999988869029     
 integration stalled: num_subseg exceeded limit
 Cell         1625
 Edge            2
 Grid            1
 Fraction of segment left   0.599999988869029     
 
+--------------------+
|   Gridded output   |
+--------------------+
 
 
+--------------------+
| NC Gridded output  |
+--------------------+
 
 
+--------------------+
|    Point output    |
+--------------------+
 
 
+--------------------+
| NC Point output    |
+--------------------+
 
 
+--------------------+
|    Track output    |
+--------------------+
 
 
+--------------------+
|    Track output    |
+--------------------+
 
 
 
Files in /scratch1/NCEPDEV/climate/Matthew.Masarik/projs/PRs/pr_1268/ww3-003/regtests/mww3_test_02/work_PR3_UNO_MPI_c_c :

Full test log: mww3_test_02.matrix03.out.txt

Additional context
Discovered while testing #1268.