feat(API): Implement users account quota guards (#6434)

* feat(cli): Implement users account quota guards

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* Remove comment

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* Address PR comments

- Getting `usersQuota` from `Settings` repo
- Revert `isUserManagementEnabled` helper
- Fix FE listing of users

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* Refactor isWithinUserQuota getter and fix tests

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* Revert testDb.ts changes

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* Cleanup & improve types

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* Fix duplicated method

* Fix failing test

* Remove `isUserManagementEnabled` completely

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* Check for globalRole.name to determine if user is owner

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* Fix unit tests

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* Set isInstanceOwnerSetUp in specs

* Fix SettingsUserView UM

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* refactor: License typings suggestions for users quota guards (#6636)

refactor: License typings suggestions

* Update packages/cli/src/Ldap/helpers.ts

Co-authored-by: Iván Ovejero <ivov.src@gmail.com>

* Update packages/cli/test/integration/shared/utils.ts

Co-authored-by: Iván Ovejero <ivov.src@gmail.com>

* Address PR comments

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

* Use 403 for all user quota related errors

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

---------

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>
Co-authored-by: Iván Ovejero <ivov.src@gmail.com>

packages/cli/test/integration/saml/saml.api.test.ts

@@ -11,6 +11,7 @@ import * as utils from '../shared/utils';
 import { sampleConfig } from './sampleMetadata';
 import { InternalHooks } from '@/InternalHooks';
 import { SamlService } from '@/sso/saml/saml.service.ee';
+import config from '@/config';
 import type { SamlUserAttributes } from '@/sso/saml/types/samlUserAttributes';
 import type { AuthenticationMethod } from 'n8n-workflow';
 
@@ -32,6 +33,8 @@ beforeAll(async () => {
 	authOwnerAgent = utils.createAuthAgent(app)(owner);
 	authMemberAgent = utils.createAgent(app, { auth: true, user: someUser });
 	noAuthMemberAgent = utils.createAgent(app, { auth: false, user: someUser });
+
+	config.set('userManagement.isInstanceOwnerSetUp', true);
 });
 
 afterAll(async () => {