AzureMonitor: Add Azure Resource Graph (#33293)

* Add Azure Resource Graph in Azure Plugin

* fix lodash import

* Fix mock queries

* use "backend" sdk

* Address comments

* add converter for object type

* Query error should cause 400 & apply template var

* fix backend test & add documentation

* update image

* Address comments

* marshal body from map

* use interpolated query instead of raw query

* fix test

* filter out empty queries

* fix go linting problem

* use new query field language name

* improve variable tests

* add better tests for interpolate variable

Co-authored-by: joshhunt <josh@trtr.co>
Co-authored-by: Erik Sundell <erik.sundell87@gmail.com>

pkg/tsdb/azuremonitor/testdata/loganalytics/7-log-analytics-all-types-table.json

@@ -42,6 +42,10 @@
           {
             "name":"XDecimal",
             "type":"decimal"
+          },
+          {
+            "name":"XObject",
+            "type":"object"
           }
         ],
         "rows": [
@@ -55,10 +59,11 @@
             9223372036854775807,
             1.7976931348623157e+308,
             "00:00:00.0000001",
-            "79228162514264337593543950335"
+            "79228162514264337593543950335",
+            "{\"person\": \"Daniel\", \"cats\": 23, \"diagnosis\": \"cat problem\"}"
           ]
         ]
       }
     ]
   }
-  
+