fix type lookup rule

[Kingwl]

Fixes #22825 .

BTW: there are many pr that required review too(

[ajafff]

Does this also fix the example code snippet in the first comment of the linked issue?

[Kingwl]

ahhh, i'm not sure that linked issue accept pr and i ignored it

[ajafff]

According to the comment of @Andy-MS that should also be accepted:

I'll still mark this as a bug because I would expect the second example to have the same behavior regardless of whether you write var foo or let foo inside the function.

[mhegazy]

@ajafff I think the issue in #22769 should be handled separately. we should condition the error reporting, and the resolution together.