Log job artifact creation in after commit

What does this MR do and why?

Move job artifact created log to an after commit callback so that it is consistently logged regardless of how they are created.

This ensures that when trace job artifact is created, it is also logged.

Screenshots or screen recordings

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How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

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 #391557 (closed)