feat(e2e): add support running behind proxy (#5348)

* docs: update maintaining

* chore(e2e): add maxFailures to playwright

* fix(ci): skip submodule in e2e job

We don't need the submodules for the e2e job. This will speed up the
checkout step.

* feat(ci): add test-e2e-proxy job

This adds a new job to CI to run our tests behind Caddy and simulate
code-server running against a reverse-proxy.

* refactor: make e2e work with reverse proxy

This refactors the e2e test in a couple ways:
- remove setting cookie in localStorage (instead we pass --auth none)
- refactor address() method to account for reverse proxy logic

* Update test/e2e/models/CodeServer.ts

* Update test/playwright.config.ts

* Update test/utils/constants.ts

Co-authored-by: Asher <ash@coder.com>

* Update test/utils/helpers.ts

Co-authored-by: Asher <ash@coder.com>

Co-authored-by: Asher <ash@coder.com>

test/utils/globalE2eSetup.ts

@@ -1,7 +1,4 @@
-import { Cookie } from "playwright"
-import { CookieKeys } from "../../src/common/http"
-import { hash } from "../../src/node/util"
-import { PASSWORD, workspaceDir } from "./constants"
+import { workspaceDir } from "./constants"
 import { clean } from "./helpers"
 import * as wtfnode from "./wtfnode"
 
@@ -20,25 +17,5 @@ export default async function () {
     wtfnode.setup()
   }
 
-  // TODO: Replace this with a call to code-server to get the cookie. To avoid
-  // too much overhead we can do an http POST request and avoid spawning a
-  // browser for it.
-  const cookies: Cookie[] = [
-    {
-      domain: "localhost",
-      expires: -1,
-      httpOnly: false,
-      name: CookieKeys.Session,
-      path: "/",
-      sameSite: "Lax",
-      secure: false,
-      value: await hash(PASSWORD),
-    },
-  ]
-
-  // Save storage state and store as an env variable
-  // More info: https://playwright.dev/docs/auth/#reuse-authentication-state
-  process.env.STORAGE = JSON.stringify({ cookies })
-
   console.log("✅ Global Setup for Playwright End-to-End Tests is now complete.")
 }