Remove InitializeAnalyticsWorker class file

What does this MR do and why?

This MR

• updates tests not to check for deprecated InitializeAnalyticsWorker
• removes the InitializeAnalyticsWorker class
• Regenerates Sidekiq queues

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 #420282 (closed)