Plugins: Support headers field for check health (#49930) (#49949)

(cherry picked from commit a7813275a5)

Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>

pkg/models/datasource.go

@@ -67,6 +67,18 @@ type DataSource struct {
 	Updated time.Time `json:"updated"`
 }
 
+// AllowedCookies parses the jsondata.keepCookies and returns a list of
+// allowed cookies, otherwise an empty list.
+func (ds DataSource) AllowedCookies() []string {
+	if ds.JsonData != nil {
+		if keepCookies := ds.JsonData.Get("keepCookies"); keepCookies != nil {
+			return keepCookies.MustStringArray()
+		}
+	}
+
+	return []string{}
+}
+
 // ----------------------
 // COMMANDS