[14.0] [ADD] queue_job_batch_size

[paradoxxxzero]

This module allows to seemlessly split a big job into smaller jobs.

It uses queue_job_batch to group the created jobs into a batch.

Example:

  class ResPartner(models.Model):
      # ...

      def copy_all_partners(self):
          # Duplicate all partners in batches of 30:
          self.with_delay(batch_size=30).copy()

  # ...
  self.env['res.partner'].search([], limit=1000).copy_all_partners()

This will create 34 jobs, each one copying 30 partners (except the last one which will copy 10) and will group them into a batch.

Instead of batch_size, one can also use batch_count to specify the number of batches to create instead.

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[simahawk]

@paradoxxxzero shall we close this one in favor of https://github.com/OCA/queue/pull/658 ?