Centralize credential handling

My thinking is that this may reduce the cognitive overhead for
developers writing new test suites.

This also allows us to perform different setup steps (like ensuring the
editor is visible when authenticated).

test/e2e/login.test.ts

@@ -1,13 +1,7 @@
 import { PASSWORD } from "../utils/constants"
 import { describe, test, expect } from "./baseFixture"
 
-describe("login", () => {
-  // Reset the browser so no cookies are persisted
-  // by emptying the storageState
-  test.use({
-    storageState: {},
-  })
-
+describe("login", false, () => {
   test("should see the login page", async ({ codeServerPage }) => {
     // It should send us to the login page
     expect(await codeServerPage.page.title()).toBe("code-server login")