Improve test report for performance_test.go
Now when we dropped 1.12
support, we improve the output, when we run the tests with benchmark flags:
go test -bench=. -benchmem
Before
BenchmarkGenerate: 6.634155 MiB/op
goos: darwin
goarch: amd64
pkg: gitlab.com/gitlab-org/gitlab-workhorse/internal/lsif_transformer/parser
BenchmarkGenerate-12 1 2160212223 ns/op 252491808 B/op 4675416 allocs/op
PASS
ok gitlab.com/gitlab-org/gitlab-workhorse/internal/lsif_transformer/parser 2.201s
After
goos: darwin
goarch: amd64
pkg: gitlab.com/gitlab-org/gitlab-workhorse/internal/lsif_transformer/parser
BenchmarkGenerate-12 1 2139190934 ns/op 6.55 MiB/op 252462472 B/op 4675280 allocs/op
PASS
ok gitlab.com/gitlab-org/gitlab-workhorse/internal/lsif_transformer/parser 2.175s