Dirty version in wheels may be fixed by removing egg info exception from gitignore

[allisonking]

Is your feature request related to a specific problem?

We had a problem where versioneer would mark our built wheel as dirty, which was solved in this PR: https://github.com/ethyca/fides/pull/962

However, there may be a cleaner solution available if we remove the egg info exception from gitignore. This was first added to deal with docker mounting, but we can actually exclude a file from a mount, which may be a cleaner solution that could solve this problem too.

Describe the solution you'd like

• Remove egg info from git ignore exception
• Add a docker volume mount exception for the egg info
• Remove the git reset --hard step added in https://github.com/ethyca/fides/pull/962

Describe alternatives you've considered, if any

This is low priority since the solution implemented in https://github.com/ethyca/fides/pull/962 does work

Additional context

https://github.com/ethyca/fides/pull/962#issuecomment-1210741886