Merge setting.InitXXX into one function with options (#24389)

This PR will merge 3 Init functions on setting packages as 1 and
introduce an options struct.

modules/doctor/doctor.go

@@ -44,8 +44,7 @@ func (w *wrappedLevelLogger) Log(skip int, level log.Level, format string, v ...
 }
 
 func initDBDisableConsole(ctx context.Context, disableConsole bool) error {
-	setting.InitProviderFromExistingFile()
-	setting.LoadCommonSettings()
+	setting.Init(&setting.Options{})
 	setting.LoadDBSetting()
 	setting.InitSQLLog(disableConsole)
 	if err := db.InitEngine(ctx); err != nil {

modules/doctor/paths.go

@@ -66,8 +66,7 @@ func checkConfigurationFiles(ctx context.Context, logger log.Logger, autofix boo
 		return err
 	}
 
-	setting.InitProviderFromExistingFile()
-	setting.LoadCommonSettings()
+	setting.Init(&setting.Options{})
 
 	configurationFiles := []configurationFile{
 		{"Configuration File Path", setting.CustomConf, false, true, false},