Refactor Logger (#13294)

Refactor Logger to make a logger interface and make it possible to
wrap loggers for specific purposes.

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

modules/log/log_test.go

@@ -11,7 +11,7 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func baseConsoleTest(t *testing.T, logger *Logger) (chan []byte, chan bool) {
+func baseConsoleTest(t *testing.T, logger *MultiChannelledLogger) (chan []byte, chan bool) {
 	written := make(chan []byte)
 	closed := make(chan bool)