Bug 1942694 - Move featuregates/ fluent files to firefoxlabs/ r=fluent-reviewers,bolsson,settings-reviewers,Gijs

Feature Gates are being removed so it makes sense to move these under a
Firefox Labs component.

Differential Revision: https://phabricator.services.mozilla.com/D239671

browser/components/preferences/preferences.xhtml

@@ -50,7 +50,7 @@
   <link rel="localization" href="browser/preferences/moreFromMozilla.ftl"/>
   <link rel="localization" href="browser/preferences/preferences.ftl"/>
   <link rel="localization" href="toolkit/branding/brandings.ftl"/>
-  <link rel="localization" href="toolkit/featuregates/features.ftl"/>
+  <link rel="localization" href="toolkit/firefoxlabs/features.ftl"/>
 
   <!-- Links below are only used for search-l10n-ids into subdialogs -->
   <link rel="localization" href="browser/aboutDialog.ftl"/>

intl/l10n/rust/l10nregistry-tests/benches/registry.rs

@@ -24,7 +24,7 @@ fn get_paths() -> Vec<ResourceId> {
         "toolkit/global/textActions.ftl",
         "toolkit/printing/printUI.ftl",
         "toolkit/updates/history.ftl",
-        "toolkit/featuregates/features.ftl",
+        "toolkit/firefoxlabs/features.ftl",
     ];
 
     paths.into_iter().map(ResourceId::from).collect()