Solver-based cursor info doesn't work at top level

For e.g:

```swift
func foo(_ x: Int) {}
func foo(_ x: String) {}

foo()
```

Cursor info on `foo` returns no results. If you however put the reference inside a function, then it returns both decls.

Swift version 6.2-dev (LLVM 53b6f8897dfb1be, Swift dd978623053f986)
Target: arm64-apple-macosx15.0

rdar://140980141