codeintel: Update codeintel/upload package
Created by: efritz
This updates the codeintelutils package that handles the logic of uploading LSIF indexes to a Sourcegraph instance. This is a big overhaul that affects UX. Screenies below.
Pre-merge checklist:
-
Merge https://github.com/sourcegraph/sourcegraph/pull/21159 -
Update go.mod