(closes #1783) Add Nemo OpenMP scripts

[sergisiso]

[codecov[bot]]

Codecov Report

Base: 99.84% // Head: 99.84% // Decreases project coverage by -0.00% :warning:

Coverage data is based on head (3fc335b) compared to base (b6aff46). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1888      +/-   ##
==========================================
- Coverage   99.84%   99.84%   -0.01%     
==========================================
  Files         301      301              
  Lines       41633    41627       -6     
==========================================
- Hits        41567    41561       -6     
  Misses         66       66              

Impacted Files	Coverage Δ
src/psyclone/psyir/nodes/array_mixin.py	100.00% <100.00%> (ø)
src/psyclone/psyir/nodes/omp_directives.py	99.79% <100.00%> (-0.01%)	:arrow_down:

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[sergisiso]

@arporter This is ready for a first review.

[sergisiso]

@arporter This is ready for another review.

[sergisiso]

@arporter This is ready for next review. I decided to do it for both: eg1 and eg2, and to still keep the level scripts.