Fixes the start and end IDs used for the migration

What does this MR do and why?

This migration iterates over system note metadata so we should use these IDs instead of the IDs of the associated notes.

These are not always in sync because if other specs have run before this that create notes without system note metadata, then the notes IDs would be different from the system note metadata IDs.

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 #371699 (closed)