Conversion of dumpers to C++

[joobog]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 89.02123% with 636 lines in your changes missing coverage. Please review.

Project coverage is 87.51%. Comparing base (d7f795e) to head (2a20823).
Report is 6 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/dumper/grib_dumper_class_grib_encode_C.cc	0.00%	170 Missing ⚠️
src/dumper/grib_dumper_class_default.cc	77.13%	75 Missing ⚠️
src/dumper/grib_dumper_class_serialize.cc	67.89%	61 Missing ⚠️
src/dumper/grib_dumper_class_wmo.cc	83.14%	59 Missing ⚠️
src/dumper/grib_dumper_class_debug.cc	84.27%	53 Missing ⚠️
src/dumper/grib_dumper_class_bufr_encode_filter.cc	93.54%	29 Missing ⚠️
src/dumper/grib_dumper_class_bufr_simple.cc	93.27%	29 Missing ⚠️
src/accessor/grib_accessor_class_gen.cc	55.10%	22 Missing ⚠️
src/dumper/grib_dumper_class_bufr_decode_filter.cc	93.02%	21 Missing ⚠️
src/dumper/grib_dumper_class_bufr_encode_C.cc	96.20%	21 Missing ⚠️
... and 13 more

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #278      +/-   ##
===========================================
- Coverage    87.78%   87.51%   -0.28%     
===========================================
  Files          829      841      +12     
  Lines        62125    61883     -242     
  Branches     11035    11008      -27     
===========================================
- Hits         54539    54156     -383     
- Misses        7586     7727     +141     

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