(towards #2671) Parallel array privatisation

[sergisiso]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.86%. Comparing base (652ad61) to head (0d03431).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2697   +/-   ##
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  Coverage   99.86%   99.86%           
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  Files         354      354           
  Lines       49046    49108   +62     
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+ Hits        48982    49044   +62     
  Misses         64       64           

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[sergisiso]

@arporter It turns out that the compare_output.py that I added in my previous PR fails to properly compare the run.stat because the scientific notation with "D" is not converted to floats by python, which expects an "E". This is not a problem for passthrough, but the OpenMP workflows return different results (I was surprised that we didn't need to exclude any file as ecmwf needed some for reproducibility!). I will fix it in this PR as the OpenMP results are the main focus for this one.

[sergisiso]

Unfortunately the new excluded files for NEMOv5 GPU cause a performance degradation in NEMOv4, so I will wait a bit for #2725 and #2685 as these remove some of the exclusions.

Additionally I can filter by routine name instead of file, as now all of them complete the passthrough.