MM-36764 mlog refactor (#18118)

Refactor mlog
- simplify mlog by removing redundant code
- remove Zap dependency
- update unit test helpers
- update logging config
- update auditing

utils/logger.go

@@ -1,74 +0,0 @@
-// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
-// See LICENSE.txt for license information.
-
-package utils
-
-import (
-	"path/filepath"
-	"strings"
-
-	"github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/shared/mlog"
-	"github.com/mattermost/mattermost-server/v6/utils/fileutils"
-)
-
-const (
-	LogRotateSize           = 10000
-	LogFilename             = "mattermost.log"
-	LogNotificationFilename = "notifications.log"
-)
-
-type fileLocationFunc func(string) string
-
-func MloggerConfigFromLoggerConfig(s *model.LogSettings, getFileFunc fileLocationFunc) *mlog.LoggerConfiguration {
-	return &mlog.LoggerConfiguration{
-		EnableConsole: *s.EnableConsole,
-		ConsoleJson:   *s.ConsoleJson,
-		ConsoleLevel:  strings.ToLower(*s.ConsoleLevel),
-		EnableFile:    *s.EnableFile,
-		FileJson:      *s.FileJson,
-		FileLevel:     strings.ToLower(*s.FileLevel),
-		FileLocation:  getFileFunc(*s.FileLocation),
-		EnableColor:   *s.EnableColor,
-	}
-}
-
-func GetLogFileLocation(fileLocation string) string {
-	if fileLocation == "" {
-		fileLocation, _ = fileutils.FindDir("logs")
-	}
-
-	return filepath.Join(fileLocation, LogFilename)
-}
-
-func GetNotificationsLogFileLocation(fileLocation string) string {
-	if fileLocation == "" {
-		fileLocation, _ = fileutils.FindDir("logs")
-	}
-
-	return filepath.Join(fileLocation, LogNotificationFilename)
-}
-
-func GetLogSettingsFromNotificationsLogSettings(notificationLogSettings *model.NotificationLogSettings) *model.LogSettings {
-	return &model.LogSettings{
-		ConsoleJson:           notificationLogSettings.ConsoleJson,
-		ConsoleLevel:          notificationLogSettings.ConsoleLevel,
-		EnableConsole:         notificationLogSettings.EnableConsole,
-		EnableFile:            notificationLogSettings.EnableFile,
-		FileJson:              notificationLogSettings.FileJson,
-		FileLevel:             notificationLogSettings.FileLevel,
-		FileLocation:          notificationLogSettings.FileLocation,
-		AdvancedLoggingConfig: notificationLogSettings.AdvancedLoggingConfig,
-		EnableColor:           notificationLogSettings.EnableColor,
-	}
-}
-
-// DON'T USE THIS Modify the level on the app logger
-func DisableDebugLogForTest() {
-	mlog.GloballyDisableDebugLogForTest()
-}
-
-// DON'T USE THIS Modify the level on the app logger
-func EnableDebugLogForTest() {
-	mlog.GloballyEnableDebugLogForTest()
-}