New typecheck issue from AvatarSource

[lindboe]

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Version Number: main branch
Reproducible in staging?: no
Reproducible in production?: no
If this was caught during regression testing, add the test name, ID and link from TestRail: n/a
Email or phone of affected tester (no customers): n/a
Logs: https://stackoverflow.com/c/expensify/questions/4856
Expensify/Expensify Issue URL: n/a
Issue reported by: @lindboe
Slack conversation: https://expensify.slack.com/archives/C01GTK53T8Q/p1702943381905719?thread_ts=1702943306.379829&cid=C01GTK53T8Q

This is a developer-only issue. Types introduced in #32731 are causing type failures on other PRs (e.g., https://github.com/Expensify/App/actions/runs/7255185932/job/19765298585?pr=32528)

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[melvin-bot]

Triggered auto assignment to @laurenreidexpensify (Bug), see https://stackoverflow.com/c/expensify/questions/14418 for more details.

[melvin-bot]

Bug0 Triage Checklist (Main S/O)

• This "bug" occurs on a supported platform (ensure Platforms in OP are ✅)
• This bug is not a duplicate report (check E/App issues and #expensify-bugs)
  • If it is, comment with a link to the original report, close the issue and add any novel details to the original issue instead
• This bug is reproducible using the reproduction steps in the OP. S/O
  • If the reproduction steps are clear and you're unable to reproduce the bug, check with the reporter and QA first, then close the issue.
  • If the reproduction steps aren't clear and you determine the correct steps, please update the OP.
• This issue is filled out as thoroughly and clearly as possible
  • Pay special attention to the title, results, platforms where the bug occurs, and if the bug happens on staging/production.
• I have reviewed and subscribed to the linked Slack conversation to ensure Slack/Github stay in sync

[tgolen]

Revert PR is here: #33261