Add ability to exclude db/bucket tag from influxdb outputs (#6184)

plugins/outputs/influxdb/http.go

@@ -94,6 +94,7 @@ type HTTPConfig struct {
 	ContentEncoding      string
 	Database             string
 	DatabaseTag          string
+	ExcludeDatabaseTag   bool
 	RetentionPolicy      string
 	Consistency          string
 	SkipDatabaseCreation bool
@@ -250,6 +251,10 @@ func (c *httpClient) Write(ctx context.Context, metrics []telegraf.Metric) error
 				batches[db] = make([]telegraf.Metric, 0)
 			}
 
+			if c.config.ExcludeDatabaseTag {
+				metric.RemoveTag(c.config.DatabaseTag)
+			}
+
 			batches[db] = append(batches[db], metric)
 		}