Add option to disable the automated settings of git env vars or make it possible to customise them #2665
Description
Current behavior
The coder agent sets the following env vars in the environment of the user.
- GIT_COMMITTER_EMAIL
- GIT_COMMITTER_NAME
- GIT_AUTHOR_EMAIL
- GIT_AUTHOR_NAME
Why can this be problematic?
It could be possible that users have a different email for their coder account that they don't want to leak in git commits or a different user name
Suggested solution
Make it possible to:
- Option A: Disable the setting of these env vars all together
- Option B: Make it possible to customize them