feat(crons): Add Solid Queue recurring task monitoring

[wedamija]

Part of a series that sends Crons monitor configs from Ruby schedulers. Check-ins for a monitor that does not exist yet are dropped, so today every monitor has to be created by hand with its schedule copied from the code. Sending the schedule lets Sentry create the monitor and keep it in sync.

Solid Queue is the default queue in Rails 8. This adds an opt-in patch for its recurring tasks (config/recurring.yml and dynamic tasks):

config.enabled_patches << :solid_queue_recurring
config.rails.solid_queue_exclude_recurring_tasks = ["clear_cache", /^tmp_/]

Tasks in solid_queue_exclude_recurring_tasks are skipped; strings match the task key, regexps are matched against it.

Each run sends in-progress and ok/error check-ins, with the task key as the slug and the task's schedule as the monitor config.

• The slug comes from the task, not the job class, so one job class behind several tasks gets one monitor per task.
• When the scheduler enqueues a task, the slug and schedule go into the job payload. The worker sends the check-ins from an around_perform, so there are no extra queries and retries check in too.
• The time zone matches Solid Queue's: the zone in the schedule, then SolidQueue.time_zone, then the local zone.
• Jobs that already call sentry_monitor_check_ins are left alone.

Stacked on #3141.
Docs: getsentry/sentry-docs#20047