Avoid crash with inject decorator in no-restricted-service-injections rule

[bmish]

Crash detected by:

• Fix setup for eslint-remote-tester for testing our rules against other repos #1741

Rule: "ember/no-restricted-service-injections"
Path: emberjs/data/tests/main/app/routes/application.ts
Link: https://github.com/emberjs/data/blob/HEAD/tests/main/app/routes/application.ts#L7

   5 |
   6 | export default class ApplicationRoute extends Route {
>  7 |   @inject declare store: Store;
   8 |
   9 |   model() {
  10 |     // adding a model to the store to enable manually testing the debug-adapter

Error:
TypeError: Cannot read property 'expression' of undefined
Occurred while linting /home/runner/work/eslint-plugin-ember/eslint-plugin-ember/node_modules/eslint-remote-tester/.cache-eslint-remote-tester/emberjs/data/tests/main/app/routes/application.ts:7

Related:

• Handle new service import style in several rules #1731