Fix system note timestamp for moved issue

What does this MR do and why?

The "moved from" system note should not use the issue creation timestamp because that is copied from the original issue

Screenshots or screen recordings

How to set up and validate locally

1. Move an issue to another project
2. Verify that the "moved from" system note has the correct timestamp

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 #363380 (closed)