Use actual github.com/go-enry/go-license-detector repository instead fork

We have requested a set of changes to the github.com/go-enry/go-license-detector package in the PR. These have been merged, but there was no release made yet.

Added to that, to fix issues found in Performance issues with go-license-detector (#4761 - closed) we started using a fork at github.com/gl-gitaly/go-license-detector in !5348 (merged). An upstream issue https://github.com/go-enry/go-license-detector/issues/31 was created, but no feedback was received.

We should aim to run code fully from upstream again and remove the replace github.com/go-enry/go-license-detector/v4 => ... line from go.mod.