Re-add ember-cli-babel, not because I think it's needed, but because I haven't proved we have sufficient compat testing

Author: NullVoxPopuli

files/package.json

@@ -73,6 +73,7 @@
     "decorator-transforms": "^2.3.0",
     "ember-auto-import": "^2.10.0",
     "ember-cli": "~6.5.0-beta.0",
+    "ember-cli-babel": "^8.2.0",
     "ember-cli-deprecation-workflow": "^3.3.0<% if (emberData) { %>",
     "ember-data": "~5.5.0<% } %>",
     "ember-load-initializers": "^3.0.1",