Log which suffix values were skipped at the DEBUG level

[jsiirola]

Fixes # .

Summary/Motivation:

Updates to the NL writer have silenced a lot of the warnings that were previously generated for declared export suffixes that were not emitted as part of the NL file. This adds additional logging (so you can get the component / data names for the skipped suffixes at the DEBUG level.

Changes proposed in this PR:

• Restore logging of the names of skipped export suffix datas, but only at the DEBUG level
• Add a test of this behavior

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (15a7bff) 87.96% compared to head (6d04656) 87.97%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3043   +/-   ##
=======================================
  Coverage   87.96%   87.97%           
=======================================
  Files         770      770           
  Lines       90162    90166    +4     
=======================================
+ Hits        79310    79322   +12     
+ Misses      10852    10844    -8     

Flag	Coverage Δ
linux	85.28% <100.00%> (+<0.01%)	⬆️
osx	75.11% <100.00%> (+<0.01%)	⬆️
other	85.47% <100.00%> (+<0.01%)	⬆️
win	82.54% <100.00%> (+0.01%)	⬆️

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[mrmundt]

After verbally talking about this PR with @jsiirola , we think it would be a good idea to add further explanation to https://pyomo.readthedocs.io/en/stable/errors.html because the reason that we skip some Suffixes can be intractable to a newer user.

[blnicho]

I opened a separate issue for documenting the skipped export suffix warnings so going to go ahead and merge this.