Use ordered stages for atomic processing

What does this MR do?

Atomic Processing allows us to use ordered_stages in all cases, thus cutting a significant amount of SQL queries to calculate statuses dynamically.

This was noticed as part of testing: #215126 (comment 331607095)

Related to:

• #197365 (closed)
• #215126 (closed)

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content