fix: get external resource blocked (#12927)

## Fix
- Use `[Config].upload.skipSafeFetch` to allow specific external urls
- Use `[Config].upload.pasteURL.allowList` to allow specific external
urls

Documentation: [Uploading files from remote
urls](https://payloadcms.com/docs/upload/overview#uploading-files-from-remote-urls)

Fixes: https://github.com/payloadcms/payload/issues/12876
Mentioned: https://github.com/payloadcms/payload/issues/7037,
https://github.com/payloadcms/payload/issues/12934
Source PR: https://github.com/payloadcms/payload/pull/12622
Issue Trace:
1. [`allowList`
Added](8b7f2ddbf4 (diff-92acf7b8d30e447a791e37820136bcbf23c42f0358daca0fdea4e7b77f7d4bc9)
)

2. [`allowList`
Removed](648c168f86 (diff-92acf7b8d30e447a791e37820136bcbf23c42f0358daca0fdea4e7b77f7d4bc9))

docs/upload/overview.mdx

@@ -109,6 +109,7 @@ _An asterisk denotes that an option is required._
 | **`mimeTypes`**                | Restrict mimeTypes in the file picker. Array of valid mimetypes or mimetype wildcards [More](#mimetypes)                                                                                                                                           |
 | **`pasteURL`**                 | Controls whether files can be uploaded from remote URLs by pasting them into the Upload field. **Enabled by default.** Accepts `false` to disable or an object with an `allowList` of valid remote URLs. [More](#uploading-files-from-remote-urls) |
 | **`resizeOptions`**            | An object passed to the the Sharp image library to resize the uploaded file. [More](https://sharp.pixelplumbing.com/api-resize)                                                                                                                    |
+| **`skipSafeFetch`**            | Set to an `allowList` to skip the safe fetch check when fetching external files. Set to `true` to skip the safe fetch for all documents in this collection. Defaults to `false`.                                                                   |
 | **`staticDir`**                | The folder directory to use to store media in. Can be either an absolute path or relative to the directory that contains your config. Defaults to your collection slug                                                                             |
 | **`trimOptions`**              | An object passed to the the Sharp image library to trim the uploaded file. [More](https://sharp.pixelplumbing.com/api-resize#trim)                                                                                                                 |
 | **`withMetadata`**             | If specified, appends metadata to the output image file. Accepts a boolean or a function that receives `metadata` and `req`, returning a boolean.                                                                                                  |
@@ -435,6 +436,24 @@ export const Media: CollectionConfig = {
 }
 ```
 
+You can also adjust server-side fetching at the upload level as well, this does not effect the `CORS` policy like the `pasteURL` option does, but it allows you to skip the safe fetch check for specific URLs.
+
+```
+import type { CollectionConfig } from 'payload'
+
+export const Media: CollectionConfig = {
+  slug: 'media',
+  upload: {
+    skipSafeFetch: [
+      {
+        hostname: 'example.com',
+        pathname: '/images/*',
+      },
+    ],
+  },
+}
+```
+
 ##### Accepted Values for `pasteURL`
 
 | Option          | Description                                                                                                                                                    |