deprecation-workflow.js is included in prod builds

[ef4]

The blueprint tries to exclude ./app/deprecation-workflow.js from non-development builds with a macro. But it doesn't do anything to prevent the same module from being included in the compatModules.

This would address the issue:

// ember-cli-build.js
return compatBuild(app, buildOnce, {
+    staticAppPaths: ['deprecation-workflow.js'],
  });

But I don't love having this special one-off here. Perhaps it would be better to establish ./app/lib and put all of that into staticAppPaths and move deprecation-workflow.js into ./app/lib.