codeintel: Give remote and tag information to index jobs

Created by: efritz

Currently lsif-go auto index jobs are failing as it uses the git remote and tags to determine package information. These are currently blank as we don't set a remote on the clone, or supply an explicit one in the index job generation.

This fetches tags and sets a remote, which are likely to be needed for other tools (and seems like a more general solution than explicitly supplying this data directly to lsif-go).