Make BulkImportWorker and BulkImport::EntityWorker retriable

What does this MR do and why?

This MR updates:

• BulkImport::EntityWorker, and
• BulkImportWorker

and make them retriable by Sidekiq. If the case of failure after 3 retries, the state of the associated record is marked as failed.

Screenshots or screen recordings

N/A

How to set up and validate locally

N/A

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #430257 (closed)