chore: Move remaining auth methods to plugins (#4900)

* Move Google, Email, and Azure to plugins

* Move OIDC provider, remove old loading code

* Move AuthLogo to plugin

* AuthLogo -> PluginIcon

* Lazy load plugin settings

plugins/email/server/.babelrc

@@ -0,0 +1,3 @@
+{ 
+  "extends": "../../../server/.babelrc"
+}