Do not include logger implementation in aries-vcx

[Patrik-Stas]

• Do not include env_logger based log implementation as part of aries_vcx - let consuming crate bring their own (mediator, aath_backchannel are already doing that)
• As a consequence, if you consume aries_vcx, make sure to include and initialize logger implementation such as env_logger in your project to see the log messages.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 53 lines in your changes are missing coverage. Please review.

Project coverage is 0.05%. Comparing base (2483098) to head (5285fd5).

Files	Patch %	Lines
aries/misc/test_utils/src/logger.rs	0.00%	50 Missing ⚠️
aries/misc/test_utils/src/devsetup.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #1149   +/-   ##
=====================================
  Coverage   0.05%   0.05%           
=====================================
  Files        476     476           
  Lines      24137   24134    -3     
  Branches    4498    4500    +2     
=====================================
  Hits          13      13           
+ Misses     24124   24121    -3     

Flag	Coverage Δ
unittests-aries-vcx	0.05% <0.00%> (+<0.01%)	⬆️

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