Do not ICE when failing to resolve for rustdoc.

[cjgillot]

Path resolution may fail and return Indeterminate if there are already errors that obscure the name space.
In that case, we shouldn't ICE, and report that resolution failed to rustdoc.

Fixes #109343
r? @petrochenkov

[petrochenkov]

Indeterminate should never be produced during late resolution, when expansion is finished and all the crate structures are built (those crate structures include Res::Err stubs for bad imports).

If Indeterminate is produced here, then something wrong is going either with the resolution determinacy logic, or maybe with Res::Err stub insertion logic, and this PR hides the root issue.

[petrochenkov]

@bvanjoi
If you want a next task you could try debugging this, the investigation should be pretty similar to #108729.

[petrochenkov]

Possible duplicates - #96012, #108762.