Return errors as much as possible
requested to merge 463661-follow-up-from-fix-lint-issues-in-internal-lsif_transformer-parser-parser-ranges-referen into master
What does this MR do and why?
This small MR refactor aims to return errors where possible and only throw them away with absolutely necessary.
Closes: Follow-up from "Fix lint issues in internal/lsi... (#463661)
Edited by Ash McKenzie