Update UAT config to use new components. See gbif/hosted-portals#302

Author: MortenHofft

_config_uat.yml

@@ -1 +1,5 @@
-url: "https://gb29.gbif-uat.org"
+url: "https://gb29.gbif-uat.org"
+
+useSharedLibrary: true # Use the new component library
+testSite: true #style the site to show that it is a test site
+graphqlEndpoint: "https://graphql.gbif-uat.org/graphql" # for use with e.g. new stories from GBIF.org