refactor(core): Use Dependency Injection for all Controller classes (no-changelog) (#8146)

## Review / Merge checklist
- [x] PR title and summary are descriptive

packages/cli/src/environments/variables/variables.controller.ee.ts

@@ -1,5 +1,3 @@
-import { Service } from 'typedi';
-
 import { VariablesRequest } from '@/requests';
 import {
 	Authorized,
@@ -17,11 +15,10 @@ import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { VariableValidationError } from '@/errors/variable-validation.error';
 import { VariableCountLimitReachedError } from '@/errors/variable-count-limit-reached.error';
 
-@Service()
 @Authorized()
 @RestController('/variables')
 export class VariablesController {
-	constructor(private variablesService: VariablesService) {}
+	constructor(private readonly variablesService: VariablesService) {}
 
 	@Get('/')
 	@RequireGlobalScope('variable:list')