chore(auth): Add oauth-client-info to Container

Because:
 - The fxa-mailer removes calls to oauth-client-info service

This Commit:
 - Adds the OAuthClientInfo to the di container for handerls to access

Closes:

Author: nshirley

packages/fxa-auth-server/bin/key_server.js

@@ -381,6 +381,13 @@ async function run(config) {
   );
   Container.set(FxaMailer, fxaMailer);
 
+  const oauthClientInfo = require('../lib/senders/oauth_client_info');
+  const { OAuthClientInfoServiceName } = oauthClientInfo;
+  Container.set({
+    id: OAuthClientInfoServiceName,
+    factory: () => oauthClientInfo(log, database),
+  });
+
   const routes = require('../lib/routes')(
     log,
     serverPublicKeys,

packages/fxa-auth-server/lib/senders/oauth_client_info.js

@@ -81,3 +81,5 @@ module.exports = (log, config) => {
     __clientCache: clientCache,
   };
 };
+
+export const OAuthClientInfoServiceName = 'OAuthClientInfo';