AlertingNG: POC of evaluator under feature flag. (#27922)

* New feature toggle for enabling alerting NG

* Initial commit

* Modify evaluate alert API request

* Check for unique labels in alert execution result dataframes

* Remove print statement

* Additional minor fixes/comments

* Fix lint issues

* Add API endpoint for evaluating panel queries

* Push missing renaming

* add refId for condition to API

* add refId for condition to API

* switch dashboard based eval to get method

* add from/to params to dashboard based eval

* add from/to params to  eval endpoint

Co-authored-by: kyle <kyle@grafana.com>

pkg/models/datasource.go

@@ -42,29 +42,29 @@ var (
 type DsAccess string
 
 type DataSource struct {
-	Id      int64
-	OrgId   int64
-	Version int
+	Id      int64 `json:"id"`
+	OrgId   int64 `json:"orgId"`
+	Version int   `json:"version"`
 
-	Name              string
-	Type              string
-	Access            DsAccess
-	Url               string
-	Password          string
-	User              string
-	Database          string
-	BasicAuth         bool
-	BasicAuthUser     string
-	BasicAuthPassword string
-	WithCredentials   bool
-	IsDefault         bool
-	JsonData          *simplejson.Json
-	SecureJsonData    securejsondata.SecureJsonData
-	ReadOnly          bool
-	Uid               string
+	Name              string                        `json:"name"`
+	Type              string                        `json:"type"`
+	Access            DsAccess                      `json:"access"`
+	Url               string                        `json:"url"`
+	Password          string                        `json:"password"`
+	User              string                        `json:"user"`
+	Database          string                        `json:"database"`
+	BasicAuth         bool                          `json:"basicAuth"`
+	BasicAuthUser     string                        `json:"basicAuthUser"`
+	BasicAuthPassword string                        `json:"basicAuthPassword"`
+	WithCredentials   bool                          `json:"withCredentials"`
+	IsDefault         bool                          `json:"isDefault"`
+	JsonData          *simplejson.Json              `json:"jsonData"`
+	SecureJsonData    securejsondata.SecureJsonData `json:"secureJsonData"`
+	ReadOnly          bool                          `json:"readOnly"`
+	Uid               string                        `json:"uid"`
 
-	Created time.Time
-	Updated time.Time
+	Created time.Time `json:"created"`
+	Updated time.Time `json:"updated"`
 }
 
 // DecryptedBasicAuthPassword returns data source basic auth password in plain text. It uses either deprecated