Fix sample_rate applying to non error events

[sl0thentr0py]

fixes #2202

#skip-changelog

[codecov]

Codecov Report

Merging #2203 (df45cce) into master (9895426) will not change coverage.
Report is 3 commits behind head on master.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2203   +/-   ##
=======================================
  Coverage   97.34%   97.34%           
=======================================
  Files         100      100           
  Lines        3734     3734           
=======================================
  Hits         3635     3635           
  Misses         99       99           

Components	Coverage Δ
sentry-ruby	98.02% <100.00%> (-0.04%)	⬇️
sentry-rails	94.98% <ø> (ø)
sentry-sidekiq	94.53% <ø> (ø)
sentry-resque	93.65% <ø> (+1.58%)	⬆️
sentry-delayed_job	94.44% <ø> (ø)
sentry-opentelemetry	100.00% <ø> (ø)

Files	Coverage Δ
sentry-ruby/lib/sentry/client.rb	100.00% <100.00%> (ø)
sentry-ruby/lib/sentry/cron/monitor_check_ins.rb	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes