chore: move average queued stats off of job submission time

[hamidzr]

Description

currently average queud stats are based off of job submission time which is probably not the most accurate measurement of the queued time we can provide

Test Plan

Commentary (optional)

Checklist

• [ ] Changes have been manually QA'd
• [ ] User-facing API changes need the "User-facing API Change" label.
• [ ] Release notes should be added as a separate file under docs/release-notes/. See Release Note for details.
• [ ] Licenses should be included for new code which was copied and/or modified from any external code.

Ticket

[netlify[bot]]

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