SettingsStore: Change feature_rust_crypto to default true (#12203)

* Set default crypto stack to rust

* Update test for default to rust crypto

* Fix labs settings tests

* Fix test not working with rust crypto

src/settings/Settings.tsx

@@ -501,7 +501,7 @@ export const SETTINGS: { [setting: string]: ISetting } = {
             }
         },
         shouldWarn: true,
-        default: false,
+        default: true,
         controller: new RustCryptoSdkController(),
     },
     // Must be set under `setting_defaults` in config.json.