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

shared/mlog/levels.go

@@ -3,49 +3,56 @@
 
 package mlog
 
-// Standard levels
+import "github.com/mattermost/logr/v2"
+
+// Standard levels.
 var (
-	LvlPanic = LogLevel{ID: 0, Name: "panic", Stacktrace: true}
-	LvlFatal = LogLevel{ID: 1, Name: "fatal", Stacktrace: true}
-	LvlError = LogLevel{ID: 2, Name: "error"}
-	LvlWarn  = LogLevel{ID: 3, Name: "warn"}
-	LvlInfo  = LogLevel{ID: 4, Name: "info"}
-	LvlDebug = LogLevel{ID: 5, Name: "debug"}
-	LvlTrace = LogLevel{ID: 6, Name: "trace"}
+	LvlPanic = logr.Panic // ID = 0
+	LvlFatal = logr.Fatal // ID = 1
+	LvlError = logr.Error // ID = 2
+	LvlWarn  = logr.Warn  // ID = 3
+	LvlInfo  = logr.Info  // ID = 4
+	LvlDebug = logr.Debug // ID = 5
+	LvlTrace = logr.Trace // ID = 6
+	StdAll   = []Level{LvlPanic, LvlFatal, LvlError, LvlWarn, LvlInfo, LvlDebug, LvlTrace}
+	// non-standard "critical" level
+	LvlCritical = Level{ID: 7, Name: "critical"}
 	// used by redirected standard logger
-	LvlStdLog = LogLevel{ID: 10, Name: "stdlog"}
+	LvlStdLog = Level{ID: 10, Name: "stdlog"}
 	// used only by the logger
-	LvlLogError = LogLevel{ID: 11, Name: "logerror", Stacktrace: true}
+	LvlLogError = Level{ID: 11, Name: "logerror", Stacktrace: true}
 )
 
 // Register custom (discrete) levels here.
-// !!!!! ID's must not exceed 32,768 !!!!!!
+// !!!!! Custom ID's must be between 20 and 32,768 !!!!!!
 var (
 	// used by the audit system
-	LvlAuditAPI     = LogLevel{ID: 100, Name: "audit-api"}
-	LvlAuditContent = LogLevel{ID: 101, Name: "audit-content"}
-	LvlAuditPerms   = LogLevel{ID: 102, Name: "audit-permissions"}
-	LvlAuditCLI     = LogLevel{ID: 103, Name: "audit-cli"}
+	LvlAuditAPI     = Level{ID: 100, Name: "audit-api"}
+	LvlAuditContent = Level{ID: 101, Name: "audit-content"}
+	LvlAuditPerms   = Level{ID: 102, Name: "audit-permissions"}
+	LvlAuditCLI     = Level{ID: 103, Name: "audit-cli"}
 
 	// used by the TCP log target
-	LvlTCPLogTarget = LogLevel{ID: 120, Name: "TcpLogTarget"}
+	LvlTCPLogTarget = Level{ID: 120, Name: "TcpLogTarget"}
 
 	// used by Remote Cluster Service
-	LvlRemoteClusterServiceDebug = LogLevel{ID: 130, Name: "RemoteClusterServiceDebug"}
-	LvlRemoteClusterServiceError = LogLevel{ID: 131, Name: "RemoteClusterServiceError"}
-	LvlRemoteClusterServiceWarn  = LogLevel{ID: 132, Name: "RemoteClusterServiceWarn"}
+	LvlRemoteClusterServiceDebug = Level{ID: 130, Name: "RemoteClusterServiceDebug"}
+	LvlRemoteClusterServiceError = Level{ID: 131, Name: "RemoteClusterServiceError"}
+	LvlRemoteClusterServiceWarn  = Level{ID: 132, Name: "RemoteClusterServiceWarn"}
 
 	// used by Shared Channel Sync Service
-	LvlSharedChannelServiceDebug            = LogLevel{ID: 200, Name: "SharedChannelServiceDebug"}
-	LvlSharedChannelServiceError            = LogLevel{ID: 201, Name: "SharedChannelServiceError"}
-	LvlSharedChannelServiceWarn             = LogLevel{ID: 202, Name: "SharedChannelServiceWarn"}
-	LvlSharedChannelServiceMessagesInbound  = LogLevel{ID: 203, Name: "SharedChannelServiceMsgInbound"}
-	LvlSharedChannelServiceMessagesOutbound = LogLevel{ID: 204, Name: "SharedChannelServiceMsgOutbound"}
+	LvlSharedChannelServiceDebug            = Level{ID: 200, Name: "SharedChannelServiceDebug"}
+	LvlSharedChannelServiceError            = Level{ID: 201, Name: "SharedChannelServiceError"}
+	LvlSharedChannelServiceWarn             = Level{ID: 202, Name: "SharedChannelServiceWarn"}
+	LvlSharedChannelServiceMessagesInbound  = Level{ID: 203, Name: "SharedChannelServiceMsgInbound"}
+	LvlSharedChannelServiceMessagesOutbound = Level{ID: 204, Name: "SharedChannelServiceMsgOutbound"}
 
-	// add more here ...
+	// Focalboard
+	LvlFBTelemetry = Level{ID: 9000, Name: "telemetry"}
+	LvlFBMetrics   = Level{ID: 9001, Name: "metrics"}
 )
 
-// Combinations for LogM (log multi)
+// Combinations for LogM (log multi).
 var (
-	MLvlAuditAll = []LogLevel{LvlAuditAPI, LvlAuditContent, LvlAuditPerms, LvlAuditCLI}
+	MLvlAuditAll = []Level{LvlAuditAPI, LvlAuditContent, LvlAuditPerms, LvlAuditCLI}
 )