Upgrade api to ember 4.12 (#1833) (#1839)

* chore: 🤖 Upgrade API layer to ember 4.12

* chore: 🤖 Upgrade ember-data to 4.12

* fix: 🐛 Fix breaking change from usage of internal method

* chore: 🤖 Remove stylelint in API addon

* test: 💍 Fix broken API tests

* chore: 🤖 get rid of toArray

* test: 💍 Fix tests broken by ember data changes

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Co-authored-by: dharini <dharini@hashicorp.com>

addons/api/ember-cli-build.js

@@ -9,7 +9,7 @@ const EmberAddon = require('ember-cli/lib/broccoli/ember-addon');
 const { maybeEmbroider } = require('@embroider/test-setup');
 
 module.exports = function (defaults) {
-  let app = new EmberAddon(defaults, {
+  const app = new EmberAddon(defaults, {
     // Add options here
   });