Add user attributes to logs

[solnic]

Closes #2639

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.37%. Comparing base (e126f72) to head (49bfad3).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2647      +/-   ##
==========================================
- Coverage   96.68%   95.37%   -1.32%     
==========================================
  Files         133      133              
  Lines        5131     5142      +11     
==========================================
- Hits         4961     4904      -57     
- Misses        170      238      +68     

Components	Coverage Δ
sentry-ruby	95.30% <100.00%> (-2.15%)	⬇️
sentry-rails	94.76% <ø> (+0.59%)	⬆️
sentry-sidekiq	96.57% <ø> (+4.62%)	⬆️
sentry-resque	94.44% <ø> (ø)
sentry-delayed_job	94.68% <ø> (ø)
sentry-opentelemetry	98.62% <ø> (ø)

Files with missing lines	Coverage Δ
sentry-ruby/lib/sentry/log_event.rb	100.00% <100.00%> (ø)
sentry-ruby/lib/sentry/scope.rb	98.78% <100.00%> (-0.61%)	⬇️

... and 18 files with indirect coverage changes

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