[BUGFIX release] Make sure the blueprints-js folder is published

[bertdeblock]

This folder is needed to generate plain JS files:
https://github.com/emberjs/ember.js/blob/master/blueprints/-maybe-polyfill-typescript-blueprints.js#L14-L15

Closes #20081.

[kategengler]

Thank you!

[NullVoxPopuli]

any chance we can get this included in 4.4.1?

just tested a brand new app (while responding to https://stackoverflow.com/a/72419459/356849 )

❯ yarn list ember-source
yarn list v1.22.11
warning Filtering by arguments is deprecated. Please use the pattern option instead.
└─ ember-source@4.4.0
Done in 0.54s.

❯ yarn ember g controller my-test
yarn run v1.22.11
$ /tmp/test-app/node_modules/.bin/ember g controller my-test
installing controller
installing controller-test
Done in 2.50s.
   
❯ gs
On branch main
nothing to commit, working tree clean