[MM-13833] Configured unit tests to log through t.Log (#10272)

* Rerouted the unit test logs through t.Log

* resolving merge confilvts

* Update testing.go

* Update helper_test.go

* Added godocs for NewTestingLogger

* Added go docs for NewTestingLogger

* Resolving conflicts

app/file_bench_test.go

@@ -57,7 +57,7 @@ func prepareTestImages(tb testing.TB) {
 
 func BenchmarkUploadFile(b *testing.B) {
 	prepareTestImages(b)
-	th := Setup().InitBasic()
+	th := Setup(b).InitBasic()
 	defer th.TearDown()
 	// disable logging in the benchmark, as best we can
 	th.App.Log.SetConsoleLevel(mlog.LevelError)