🔥(plugins) remove CommuneCreation plugin

Remove the French communes auto-provisioning plugin that handled
SIRET lookup, DNS setup, and MailDomain creation.

src/frontend/apps/e2e/__tests__/app-desk/domain-provisioning.spec.ts

@@ -1,27 +0,0 @@
-import { expect, test } from '@playwright/test';
-
-import { keyCloakSignIn } from './common';
-
-test.beforeEach(async ({ page, browserName }) => {
-  await page.goto('/');
-  await keyCloakSignIn(page, browserName, 'marie');
-});
-
-test.describe('When a commune, domain is created on first login via ProConnect', () => {
-  test('it checks the domain has been created and is operational', async ({
-    page,
-  }) => {
-    const menu = page.locator('menu').first();
-
-    await menu.getByRole('button', { name: 'Mail Domains button' }).click();
-    await page.waitForURL('http://localhost:3000/mail-domains/**');
-    await expect(
-      page.getByRole('heading', {
-        name: 'Domains of the organization',
-        exact: true,
-      }),
-    ).toBeVisible();
-    await expect(page.getByText('merlaut.test.collectivite.fr')).toHaveCount(1);
-    await expect(page.getByText('No domains exist.')).toHaveCount(0);
-  });
-});