Add support for lock_ttl to be a Proc/class method

[brayden-onesignal]

Same as #878 but to upstream into main

Adds the ability to set the lock_ttl to a Proc or class method, allowing callers to set the TTL based on job arguments or other runtime information.

For my case, I need to set the lock_ttl dynamically based on one of the arguments supplied. I can accomplish this with a Sidekiq Middleware that runs before SidekiqUniqueJobs, but I'd prefer to provide a proc to calculate.

Sample Job

class DoSomethingCoolWorker
  # ...
  sidekiq_options lock: :until_expired, lock_ttl: :until_end_of_trial

  def self.until_end_of_trial(args)
    user = User.find(args.first)
    user.trial_ends_at - Time.zone.now
  end
  
  def perform(user_id)
    # ...
  end
end

[brayden-onesignal]

Codeclimbate seems to be failing on TODOs that existed before this PR

[mhenrixon]

Solid addition!