feat: add event stats for sidekiq and sq

[roelbondoc]

Similar to Karafka's stats event, this adds the collected cluster based stats as a wide event for Sidekiq and SolidQueue. The previous aggregated metrics can be toggled on, while the new events can be toggled off.

# Turn off all events for Sidekiq and SolidQueue
sidekiq:
  insights:
    events: false
solid_queue:
  insights:
    events: false

# Turn on all aggregated metrics for Sidekiq and SolidQueue
sidekiq:
  insights:
    metrics: true
solid_queue:
  insights:
    metrics: true

In addition, the polling interval has been decreased to 5 seconds to allow for up to date readings.

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