Replace ResLog with Python logging

[pinkwah]

We've recently implemented Python logging in C++ via pybind. ResLog was the previous attempt at this.

This PR deprecates LOG_LEVEL and LOG_FILE ERT config keys as well.

TODO:

• Deprecate LOG_LEVEL
• Deprecate LOG_FILE
• Generalise logging.hpp testing
• Fix old_tests to use ILogger rather than reslog.

[ManInFez]

This looks like a solid piece of work 👍 Would you not say that LOG keywords are not deprecated but ignored or not supported?

[dafeda]

Real nice 👍

[codecov-commenter]

Codecov Report

Merging #2710 (8ef32fc) into main (5882f0c) will decrease coverage by 0.11%.
The diff coverage is 19.82%.

@@            Coverage Diff             @@
##             main    #2710      +/-   ##
==========================================
- Coverage   65.27%   65.16%   -0.12%     
==========================================
  Files         653      649       -4     
  Lines       53121    52803     -318     
  Branches     4769     4744      -25     
==========================================
- Hits        34677    34409     -268     
+ Misses      16852    16809      -43     
+ Partials     1592     1585       -7     

Impacted Files	Coverage Δ
.../ertwidgets/models/analysismodulevariablesmodel.py	56.25% <ø> (ø)
ert_shared/ide/keywords/run_keywords.py	100.00% <ø> (ø)
libres/lib/analysis/update.cpp	40.62% <0.00%> (+0.26%)	⬆️
libres/lib/config/config_parser.cpp	82.60% <0.00%> (-0.61%)	⬇️
libres/lib/enkf/analysis_config.cpp	51.70% <0.00%> (-0.35%)	⬇️
libres/lib/enkf/config_keys.cpp	0.81% <ø> (+0.01%)	⬆️
libres/lib/enkf/enkf_main.cpp	51.59% <0.00%> (-1.09%)	⬇️
libres/lib/enkf/enkf_main_jobs.cpp	15.28% <0.00%> (+0.05%)	⬆️
libres/lib/enkf/enkf_main_manage_fs.cpp	63.00% <0.00%> (ø)
libres/lib/enkf/ert_workflow_list.cpp	81.12% <0.00%> (+0.09%)	⬆️
... and 35 more

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