refactor: 💡 remove explicit byow-pki-upstream, as it is default (#1658)

* refactor: 💡 consolidate ssh features into ssh-target flag

✅ Closes: ICU-8383

* refactor: 💡 factor out base edition

* feat: 🎸 dynamic feature edition enablement and toggling

* refactor: 💡 remove explicit byow-pki-upstream, as it is default

✅ Closes: ICU-8551

* refactor: 💡 extract feature flag config into separate file

ui/admin/tests/integration/components/form/worker/create-worker-led-test.js

@@ -21,7 +21,6 @@ module(
     hooks.beforeEach(function () {
       const featuresService = this.owner.lookup('service:features');
       featuresService.enable('byow-pki-hcp-cluster-id');
-      featuresService.disable('byow-pki-upstream');
     });
 
     test('it correctly populates the cluster id for an hcp dev cluster', async function (assert) {