Allow setting defaults for MonitorConfig objects with new Cron::Confi…

[sl0thentr0py]

closes #2205

[codecov]

Codecov Report

Merging #2211 (882740e) into master (2f9ffaf) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2211   +/-   ##
=======================================
  Coverage   97.37%   97.37%           
=======================================
  Files         101      102    +1     
  Lines        3805     3814    +9     
=======================================
+ Hits         3705     3714    +9     
  Misses        100      100           

Components	Coverage Δ
sentry-ruby	98.07% <100.00%> (+<0.01%)	⬆️
sentry-rails	94.98% <ø> (ø)
sentry-sidekiq	94.70% <ø> (ø)
sentry-resque	92.06% <ø> (ø)
sentry-delayed_job	94.44% <ø> (ø)
sentry-opentelemetry	100.00% <ø> (ø)

Files	Coverage Δ
sentry-ruby/lib/sentry/configuration.rb	98.78% <100.00%> (+0.01%)	⬆️
sentry-ruby/lib/sentry/cron/configuration.rb	100.00% <100.00%> (ø)
sentry-ruby/lib/sentry/cron/monitor_config.rb	100.00% <100.00%> (ø)

[adinauer]

LGTM