OpenFeature: Add context attributes to frontend settings (#112105)

* Update targeting key to namespace

* Pass eval ctx attributes to frontend

* Add context config to the frontend

* Fix OF namespace not defined in e2e tests

* Set default namespace and targeting key

* remove e2e server config now that namespace is default

---------

Co-authored-by: joshhunt <josh.hunt@grafana.com>

pkg/api/dtos/frontend_settings.go

@@ -305,6 +305,7 @@ type FrontendSettingsDTO struct {
 
 	LocalFileSystemAvailable bool `json:"localFileSystemAvailable"`
 	// Experimental Scope settings
-	ListScopesEndpoint          string `json:"listScopesEndpoint"`
-	ListDashboardScopesEndpoint string `json:"listDashboardScopesEndpoint"`
+	ListScopesEndpoint          string            `json:"listScopesEndpoint"`
+	ListDashboardScopesEndpoint string            `json:"listDashboardScopesEndpoint"`
+	OpenFeatureContext          map[string]string `json:"openFeatureContext"`
 }