refactor(cli): settings doesn't log anymore

[mrgrain]

Removes logging from the Settings class. Logging was only used when loading settings from a file and that functionality is currently only used by the UserConfiguration class of the CLI. So I localized the loading there. If we wanted to re-introduce a generic loading from file in the future, we just need to build it with the IoHost in mind.

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 77.41935% with 14 lines in your changes missing coverage. Please review.

Project coverage is 85.12%. Comparing base (68b0725) to head (72accdc).

Files with missing lines	Patch %	Lines
packages/aws-cdk/lib/cli/user-configuration.ts	77.41%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #267      +/-   ##
==========================================
- Coverage   85.29%   85.12%   -0.17%     
==========================================
  Files         220      220              
  Lines       36619    36627       +8     
  Branches     4458     4437      -21     
==========================================
- Hits        31234    31179      -55     
- Misses       5288     5352      +64     
+ Partials       97       96       -1     

Flag	Coverage Δ
suite.unit	85.12% <77.41%> (-0.17%)	⬇️

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