Use Data frames response format (#1099)

* Use data frames for numeric data

* Use data frames for text data

* Use data frames for IT services

* fix multiple series

* Convert to the wide format if possible

* Fix table format for text data

* Add refId to the data frames

* Align time series from Zabbix API

* Fill gaps with nulls

* Fix moving average functions

* Option for disabling data alignment

* remove unused logging

* Add labels to data frames

* Detect units

* Set min and max for if percent unit used

* Use value mapping from Zabbix

* Rename unitConverter -> convertZabbixUnit

* More units

* Add missing points in front of each series

* Fix handling table data

* fix db connector data frames handling

* fix it services data frames handling

* Detect all known grafana units

* Chore: remove unused logging

* Fix problems format

* Debug logging: show original units

* Add global option for disabling data alignment

* Add tooltip for the disableDataAlignment feature

* Add note about query options

* Functions for aligning timeseries on the backend

src/datasource-zabbix/query.controller.ts

@@ -27,6 +27,7 @@ function getTargetDefaults() {
     options: {
       showDisabledItems: false,
       skipEmptyValues: false,
+      disableDataAlignment: false,
     },
     table: {
       'skipEmptyValues': false
@@ -455,6 +456,7 @@ export class ZabbixQueryController extends QueryCtrl {
   renderQueryOptionsText() {
     const metricOptionsMap = {
       showDisabledItems: "Show disabled items",
+      disableDataAlignment: "Disable data alignment",
     };
 
     const problemsOptionsMap = {