8183: Fix missing command error with macros r=Veykril a=brandondong
**Reproduction:**
1. Define a struct through a macro (can be via `macro_rules`, proc macro, or `include!()`).
2. !!MISSING: command!! annotation appears. Clicking on it results in an error message. No matter where the macro is called/defined, the annotation is always at the start of the file.
**Cause:**
- For struct `A`, a `HasImpls` annotation is added just like for struct `B`. Unlike `B`, the file id for `A` is not the file we are adding annotations to but a macro file.
- The resolving step of the code lens does not succeed.
**Fix:**
- Check that the files match before computing offsets and adding `HasImpls`/`HasReferences` annotations.
Co-authored-by: Brandon <brandondong604@hotmail.com>
2aa64831e5
