Tests: consistent helper function names

authorization_test.go

cable_test.go

channel_test.go

gitaly_integration_test.go

gitaly_test.go

internal/artifacts/artifacts_store_test.go

internal/artifacts/artifacts_upload_test.go

internal/artifacts/entry_test.go

internal/channel/wrappers_test.go

internal/git/archive_test.go

internal/git/blob_test.go

internal/sendurl/sendurl_test.go

internal/staticpages/deploy_page_test.go

internal/staticpages/error_pages_test.go

internal/staticpages/servefile_test.go

internal/testhelper/testhelper.go

internal/upload/uploads_test.go

internal/upstream/development_test.go

internal/upstream/handlers_test.go

main_test.go