Fix CI

[st0012]

There are several issues causing the CI to fail:

Fix sentry-rails' test failures caused by Zeitwerk exception

1. By default, Rails eager loads the app through Zeitwerk and registers
   future eager load calls with the after_class_unload hook. This hook
   makes sure the app would be eagerly reloaded after the app is unloaded.
   (code)

2. Since version 2.6.5, Zeitwerk raises an error when the app is being
   eager loaded without a proper setup.

3. Our test app is not properly setup for being reloaded. So when the app
   is unloaded, it's not ready for the next eager load call, which means
   it'd trigger the error mentioned in 2.

So this PR simply marks the app as not reloadable, which means it doesn't register the callback mentioned in 1 and avoids the later errors.

Fix sentry-resque's test failure caused by mono_logger

It's caused by mono_logger (a resque dependency)'s conflict with Ruby 3.3's Logger. I've opened an issue and worked around it by changing Resque's logger in our tests.

Fix sentry-ruby's test failure caused by error message change

#skip-changelog

[codecov]

Codecov Report

Patch coverage: 66.66% and project coverage change: +1.83 🎉

Comparison is base (803ba73) 96.73% compared to head (5ead502) 98.57%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2014      +/-   ##
==========================================
+ Coverage   96.73%   98.57%   +1.83%     
==========================================
  Files         129      157      +28     
  Lines        8578    10075    +1497     
==========================================
+ Hits         8298     9931    +1633     
+ Misses        280      144     -136     

Impacted Files	Coverage Δ
sentry-ruby/spec/sentry/client_spec.rb	96.33% <50.00%> (-0.37%)	⬇️
...try-rails/spec/dummy/test_rails_app/configs/7-1.rb	100.00% <100.00%> (ø)
...ry/rails/tracing/active_storage_subscriber_spec.rb	94.87% <0.00%> (ø)
sentry-rails/app/jobs/sentry/send_event_job.rb	60.00% <0.00%> (ø)
...ry/rails/breadcrumbs/active_support_logger_spec.rb	100.00% <0.00%> (ø)
...ntry-rails/spec/sentry/rails/configuration_spec.rb	100.00% <0.00%> (ø)
sentry-rails/lib/sentry/rails/error_subscriber.rb	100.00% <0.00%> (ø)
...rails/tracing/action_controller_subscriber_spec.rb	100.00% <0.00%> (ø)
sentry-rails/lib/sentry/rails/action_cable.rb	100.00% <0.00%> (ø)
sentry-rails/spec/dummy/test_rails_app/app.rb	92.64% <0.00%> (ø)
... and 34 more

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[st0012]

@sl0thentr0py There still are some test failures to address. I'll try to fix everything this week.