E2E: Add reliable report schedule jobs

What does this MR do and why?

Describe in detail what your merge request does and why.

Add scheduled job definition for reliable-spec report generation

Part of: !74460 (merged)

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.