Support enable/disable sidekiq spy

[saiqulhaq]

Is your feature request related to a problem? Please describe.

this gem causing a random error in my code that use mongodb. such as:

NameError: undefined local variable or method `type' for #<BSON::Document:0x00007f28841f58e8>

I found an old issue in apm-agent-ruby, mentioned that it is because RubyVM issue.
Currently I use Ruby v2.7

Describe the solution you'd like

Add functionality in Spy Sidekiq middleware, to be something like this:

class Middleware
  def call(worker, job, queue)
    worker_class = worker.class
    
    if worker_class.respond_to?(:apm_tracking_disabled?) && worker_class.apm_tracking_disabled?
      yield
    else
      name = SidekiqSpy.name_for(job)
      transaction = ElasticAPM.start_transaction(name, 'Sidekiq')
      ElasticAPM.set_label(:queue, queue)

      begin
        yield
        transaction&.done :success
        transaction&.outcome = Transaction::Outcome::SUCCESS
      rescue ::Exception => e
        ElasticAPM.report(e, handled: false)
        transaction&.done :error
        transaction&.outcome = Transaction::Outcome::FAILURE
        raise
      ensure
        ElasticAPM.end_transaction
      end
    end
  end
end

the above code is from AI. the main concept is to add additional config in my sidekiq worker class, such as self.apm_tracking_disabled = true

it's ok if you can't accept this idea, I could override the Spy Middleware class in my app instead.