Resolve "Increase sidekiq CPU request"

What does this MR do?

This increases sidekiq CPU requests from 300m to 500m.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Closes #34953 (closed)