MM-22784 Advanced logging config for audit (#15076)

Adds the advanced logging config for audit. Existing support for auditing to a single file remains for E0 and E10 licenses instances, and a new config item ExperimentalAuditSettings.AdvancedLoggingConfig is added that behaves like LogSettings.AdvancedLoggingConfig.

Supported destinations:

- file
- syslog (with out without TLS)
- raw TCP socket (with out without TLS)

ExperimentalAuditSettings.AdvancedLoggingConfig can contain a filespec to a config file, a database DSN, or JSON.

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>
Co-authored-by: Claudio Costa <cstcld91@gmail.com>

app/app_iface.go

@@ -214,10 +214,10 @@ type AppIface interface {
 	IsUsernameTaken(name string) bool
 	// LimitedClientConfigWithComputed gets the configuration in a format suitable for sending to the client.
 	LimitedClientConfigWithComputed() map[string]string
-	// LogAuditRec logs an audit record using default CLILevel.
+	// LogAuditRec logs an audit record using default LvlAuditCLI.
 	LogAuditRec(rec *audit.Record, err error)
 	// LogAuditRecWithLevel logs an audit record using specified Level.
-	LogAuditRecWithLevel(rec *audit.Record, level audit.Level, err error)
+	LogAuditRecWithLevel(rec *audit.Record, level mlog.LogLevel, err error)
 	// MakeAuditRecord creates a audit record pre-populated with defaults.
 	MakeAuditRecord(event string, initialStatus string) *audit.Record
 	// MarkChanelAsUnreadFromPost will take a post and set the channel as unread from that one.