Fix overlooked break due to removal of Overflow

[mehmetf]

Description

Introduced in cd593dae#diff-7f71460835520a1820d69cd0b6994c01L45 removed Overflow enum but added it back to make it a non-breaking change. However, during that process, author forgot to add back the removed export.

Related Issues

Tests

None.

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Breaking Change

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[mehmetf]

I need to submit this now since this is an important forward fix.

[jonahwilliams]

LGTM

[mehmetf]

Thanks Jonah. g3 results indicate that there are other problems with cd593da. The whole PR might be reverted. Waiting for Yuqian's input.

[mehmetf]

Superseded by #58344.