Dashboard: Add dashboard validation warning to save drawer (#55732)

* add api route for validating a dashboard json

* add feature flag for showDashboardValidationWarnings

* tidy up

* comments and messages

* swagger specs

* fix typo

* more swagger

* tests!

* tidy test a little bit

* no more ioutil

* api will return different status code depending on validation error

* clean up

* handle 4xx errors

* remove console.log

* fix backend tests

* tidy up

* Swagger: Exclude alpha endpoints

Co-authored-by: Sofia Papagiannaki <1632407+papagian@users.noreply.github.com>

pkg/services/featuremgmt/registry.go

@@ -322,6 +322,10 @@ var (
 			State:           FeatureStateAlpha,
 			RequiresDevMode: true,
 		},
+		{
+			Name:        "showDashboardValidationWarnings",
+			Description: "Show warnings when Dashboards do not validate against the schema",
+		},
 		{
 			Name:        "mysqlAnsiQuotes",
 			Description: "Use double quote to escape keyword in Mysql query",

pkg/services/featuremgmt/toggles_gen.go

@@ -239,6 +239,10 @@ const (
 	// Reusable query library
 	FlagQueryLibrary = "queryLibrary"
 
+	// FlagShowDashboardValidationWarnings
+	// Show warnings when Dashboards do not validate against the schema
+	FlagShowDashboardValidationWarnings = "showDashboardValidationWarnings"
+
 	// FlagMysqlAnsiQuotes
 	// Use double quote to escape keyword in Mysql query
 	FlagMysqlAnsiQuotes = "mysqlAnsiQuotes"