feat(sentry-sidekiq): add report_errors_via_rails config

[lucasmazza]

Description

Adds a report_errors_via_rails config to sentry-sidekiq to fix #2698. When this is enabled, exceptions reported by the Sidekiq error handler will first go through Rails.error (and Rails::Sentry::ErrorSubscriber) before being sent to Sentry.

This allow exceptions from Sidekiq jobs to use the same context from Rails.error.set_context or Rails.error.add_middleware (available on Rails 8.1+)

Fixes RUBY-92

[lucasmazza]

I'm testing this with our Rails app but the solution isn't quite there yet - Rails reporter is ignoring the exception because the retry check has marked it as @__rails_error_reported somehow :/