Fix issue with grid_second_order hanging when encoding fields with Infinite values

[pmarguinaud]

Enabling grid_second_order encoding does not fail when the field to encode contains Infinite values. Instead, it never terminates.

This PR :

• adds a test to highlight the problem (commit a7f0abf)
• adds a test in grib_scaling.cc to fix the issue (commit 3c38609); make the program abort when infinite (or nan) values are encountered

[shahramn]

Dear @pmarguinaud
Many thanks for your PR. But I noticed there are several changes (14 in total) but only a few related to the issue.
Can you please rebase your branch with the latest ecCodes "develop" branch?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 74.00000% with 13 lines in your changes missing coverage. Please review.

Project coverage is 87.80%. Comparing base (7f326c9) to head (3c38609).
Report is 29 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/eccodes.cc	67.64%	11 Missing ⚠️
src/grib_scaling.cc	33.33%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #247      +/-   ##
===========================================
- Coverage    87.80%   87.80%   -0.01%     
===========================================
  Files          776      777       +1     
  Lines        62496    62512      +16     
  Branches     11035    11036       +1     
===========================================
+ Hits         54872    54886      +14     
- Misses        7624     7626       +2     

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[shahramn]

I have manually merged your changes. The next release of ecCodes (v2.39.0) will have it.
Many thanks