Fix ember 7 beta/canary compat: service inject, @glimmer/component

- Replace `inject as injectService` with `service as injectService` from
  @ember/service (inject was removed in ember 7)
- Update @glimmer/component to ^2.0.0 (v1 imports from the ember barrel
  which was removed in ember 7)

Verified locally: lints pass, 553/553 tests pass.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: NullVoxPopuli

test-app/package.json

@@ -38,7 +38,7 @@
     "@ember/test-waiters": "^4.0.0",
     "@embroider/macros": "^1.20.2",
     "@embroider/test-setup": "^3.0.3",
-    "@glimmer/component": "^1.1.2",
+    "@glimmer/component": "^2.0.0",
     "@glimmer/tracking": "^1.1.2",
     "concurrently": "^8.0.1",
     "ember-auto-import": "^2.13.1",

test-app/pnpm-lock.yaml

@@ -1,6 +1,6 @@
 import { module, test } from 'qunit';
 import { isTesting } from '@ember/debug';
-import Service, { inject as injectService } from '@ember/service';
+import Service, { service as injectService } from '@ember/service';
 import {
   setupContext,
   teardownContext,