test: standardize l10n mock usage in SignersList.spec.ts

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

src/tests/components/validation/SignersList.spec.ts

@@ -4,7 +4,6 @@
  */
 
 import { beforeAll, beforeEach, describe, expect, it, vi } from 'vitest'
-import { createL10nMock } from '../../testHelpers/l10n.js'
 import { mount, VueWrapper } from '@vue/test-utils'
 
 type Signer = {
@@ -29,7 +28,7 @@ type SignersListWrapper = VueWrapper<any> & {
 let SignersList: unknown
 
 
-vi.mock('@nextcloud/l10n', () => createL10nMock())
+vi.mock('@nextcloud/l10n', () => globalThis.mockNextcloudL10n())
 
 vi.mock('@nextcloud/moment', () => ({
 	default: vi.fn((date) => ({