Sourcegraph fails to fetch/update gitolite repos that have @ in their name

Created by: aisbaa

• Sourcegraph version: 3.26

Steps to reproduce:

For repos that contain @ symbol in their name Sourcegraph adds ? before @ symbol when fetching.

0. Suspected code https://sourcegraph.com/github.com/sourcegraph/sourcegraph/-/blob/internal/vcs/url.go#L80-107
1. Go playground example https://play.golang.org/p/f5fn4p64LLn
2. Regex playground https://regex101.com/r/DAuCaS/1

Expected behavior:

Sourcegraph should no add ? before @ to repo name when fetching from gitolite.