`go fix`: run and add to CI

[TyHil]

GoLang 1.26 introduces the go fix command which modernizes parts of the language. For this issue do 2 things:

1. Run the go fix command on the codebase.
2. Create a new GitHub action similar to .github/workflows/go.yml that runs go fix with the diff flag and fails if there are any changes. Don't add this to the existing .github/workflows/go.yml workflow as there is no need to run this on both Ubuntu and Windows.

Related to #175 and UTDNebula/nebula-api#407