New feature: capture recent logs for testing (rework)

[josecelano]

Relates to:

• Sdterror output from tracing running tests #1069
• New feature: capture recent logs for testing #1148

This feature will be used in the future to write assertions about logs.

It also changes when we show logs running tests. If you run tests with:

cargo test

logs won't be shown. If you want to see the logs you have to execute tests
with:

cargo test -- --nocapture

[josecelano]

ACK d11ab32

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 76.13%. Comparing base (4a9dcef) to head (d11ab32).
Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/bootstrap/logging.rs	0.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1149      +/-   ##
===========================================
- Coverage    76.24%   76.13%   -0.12%     
===========================================
  Files          173      173              
  Lines        11543    11551       +8     
  Branches     11543    11551       +8     
===========================================
- Hits          8801     8794       -7     
- Misses        2579     2590      +11     
- Partials       163      167       +4     

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