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

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

package.json

@@ -312,6 +312,7 @@
     "@locker/near-membrane-shared-dom": "0.14.0",
     "@msagl/core": "^1.1.19",
     "@msagl/parser": "^1.1.19",
+    "@openfeature/ofrep-web-provider": "^0.3.3",
     "@openfeature/web-sdk": "^1.6.1",
     "@opentelemetry/api": "1.9.0",
     "@opentelemetry/exporter-collector": "0.25.0",