Change to run grib_to_netcdf on salish

[douglatornell]

grib_to_netcdf, after refactor for HRDPS continental grid, uses dask and needs lots of memory. So, use the persistent dask cluster on salish.

[codecov]

Codecov Report

Merging #167 (bdf2e58) into main (d6d0475) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #167   +/-   ##
=======================================
  Coverage   75.77%   75.77%           
=======================================
  Files         127      127           
  Lines       16906    16906           
  Branches     1196     1196           
=======================================
  Hits        12810    12810           
  Misses       4045     4045           
  Partials       51       51           

Flag	Coverage Δ
unittests	75.77% <100.00%> (ø)

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Impacted Files	Coverage Δ
nowcast/next_workers.py	97.86% <ø> (ø)
tests/test_next_workers.py	98.79% <100.00%> (ø)

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