fix: overrides entity visibility within drawers (#9546)

When using the `admin.hidden: true` property on a collection, it
rightfully removes all navigation and routing for that particular
collection. However, this also affects the expected behavior of hidden
entities when they are rendered within a drawer, such as the document
drawer or list drawer. For example, when creating a new _admin.hidden_
document through the relationship or join field, the drawer should still
render the view, despite the underlying route for that view being
disabled. This change was a result of the introduction of on-demand
server components in #8364, where we now make a server roundtrip to
render the view in its entirety, which include the logic that redirects
these hidden entities.

Now, we pass a new `overrideEntityVisibility` argument through the
server function that, when true, skips this step. This way documents can
continue to respect `admin.hidden` while also having the ability to
override on a case-by-case basis throughout the UI.

test/joins/config.ts

@@ -4,6 +4,7 @@ import path from 'path'
 import { buildConfigWithDefaults } from '../buildConfigWithDefaults.js'
 import { Categories } from './collections/Categories.js'
 import { CategoriesVersions } from './collections/CategoriesVersions.js'
+import { HiddenPosts } from './collections/HiddenPosts.js'
 import { Posts } from './collections/Posts.js'
 import { Singular } from './collections/Singular.js'
 import { Uploads } from './collections/Uploads.js'
@@ -24,6 +25,7 @@ export default buildConfigWithDefaults({
   collections: [
     Posts,
     Categories,
+    HiddenPosts,
     Uploads,
     Versions,
     CategoriesVersions,