fix: client config context inheritance (#13790)

Redirecting from login to any non-auth collection crashes the page with
the following error:

```
Cannot read properties of null (reading 'fields')
```

TL;DR: the page-level config context was threading stale methods from
the root config provider.

#### Background

The client config is now gated behind authentication as of #13714, so it
changes based on authentication status. If the root layout is mounted
before authentication, it puts the unauthenticated client config into
state for the entire app to consume.

On login, the root layout does not re-render, so the page itself needs
to generate a fresh client config and sync it up.

This leads to race conditions, however, where if the login page included
a `?redirect=` param, the redirect would take place _before_ the
page-level client config could sync to the layout, and ultimately crash
the page. This was addressed in #13786.

While this fixed redirects to the "users" collection, this collection is
_already_ included in the client config (soon to be omitted by #13785).
So if you redirect to any other collection, the above error occurs.

#### Problem

The page-level config context is only overriding the `config` property,
keeping stale methods from the root config provider. This means calling
`getEntityConfig` during this moment in the time would reference the
stale config, although `config` itself would be fresh.

#### Solution

Wrap the page with an entirely new context provider. Do not thread
inherited methods from the root provider, this way all new methods get
instantiated using the fresh config.

---
- To see the specific tasks where the Asana app for GitHub is being
used, see below:
  - https://app.asana.com/0/0/1211332845301596

test/access-control/e2e.spec.ts

@@ -17,10 +17,10 @@ import {
   ensureCompilationIsDone,
   exactText,
   initPageConsoleErrorCatch,
-  login,
   saveDocAndAssert,
 } from '../helpers.js'
 import { AdminUrlUtil } from '../helpers/adminUrlUtil.js'
+import { login } from '../helpers/e2e/auth/login.js'
 import { initPayloadE2ENoConfig } from '../helpers/initPayloadE2ENoConfig.js'
 import { POLL_TOPASS_TIMEOUT, TEST_TIMEOUT_LONG } from '../playwright.config.js'
 import {