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/config/features.js

@@ -0,0 +1,54 @@
+const EDITION = process.env.EDITION || 'oss'; // Default edition is OSS
+
+const selectedEdition = EDITION;
+
+// Base edition declares available features, disabled by default.
+const baseEdition = {
+  byow: false,
+  'byow-pki-hcp-cluster-id': false,
+  'json-credentials': false,
+  'ssh-target': false,
+  'static-credentials': false,
+  'target-worker-filters-v2': false,
+  'target-worker-filters-v2-ingress': false,
+  'target-worker-filters-v2-hcp': false,
+  'target-network-address': false,
+  'vault-worker-filter': false,
+};
+// Editions maps edition keys to their associated featuresets.
+const featureEditions = {};
+featureEditions.oss = {
+  ...baseEdition,
+  byow: true,
+  'json-credentials': true,
+  'static-credentials': true,
+  'target-worker-filters-v2': true,
+  'target-network-address': true,
+};
+featureEditions.enterprise = {
+  ...featureEditions.oss,
+  'ssh-target': true,
+  'target-worker-filters-v2-ingress': true,
+  'vault-worker-filter': true,
+};
+featureEditions.hcp = {
+  ...featureEditions.enterprise,
+  'byow-pki-hcp-cluster-id': true,
+  'target-worker-filters-v2-hcp': true,
+};
+
+/**
+ * Takes a set of features and enables them in all editions.
+ * For use in development and testing only.
+ */
+const enableFeaturesInAllEditions = (features = {}, ENV) => {
+  Object.entries(featureEditions).forEach(
+    ([key, edition]) => (ENV.featureEditions[key] = { ...features, ...edition })
+  );
+};
+
+module.exports = {
+  featureEditions,
+  selectedEdition,
+  enableFeaturesInAllEditions,
+};