External Libraries: Update the Requests library to version 2.0.0.

This is a major release and contains breaking changes.

Most important changes to be aware of for this release:
* All code is now namespaced. Though there is a full backward compatibility layer available and the old class names are still supported, using them will generate a deprecation notice (which can be silenced by plugins if they'd need to support multiple WP versions). See the [https://requests.ryanmccue.info/docs/upgrading.html upgrade guide] for more details.
* A lot of classes have been marked `final`. This should generally not affect userland code as care has been taken to not apply the `final` keyword to classes which are known to be extended in userland code.
* Extensive input validation has been added to Requests. When Requests is used as documented though, this will be unnoticable.
* A new `WpOrg\Requests\Requests::has_capabilities()` method has been introduced which can be used to address #37708.
* A new `WpOrg\Requests\Response::decode_body()` method has been introduced which may be usable to simplify some of the WP native wrapper code.
* Remaining PHP 8.0 compatibility fixed (support for named parameters).
* PHP 8.1 compatibility.

Release notes: https://github.com/WordPress/Requests/releases/tag/v2.0.0

For a full list of changes in this update, see the Requests GitHub:
https://github.com/WordPress/Requests/compare/v1.8.1...v2.0.0

Follow-up to [50842], [51078].

Props jrf, schlessera, datagutten, wojsmol, dd32, dustinrue, soulseekah, costdev, szepeviktor.
Fixes #54504.

git-svn-id: https://develop.svn.wordpress.org/trunk@52244 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-http-requests-hooks.php

@@ -12,9 +12,9 @@
  *
  * @since 4.7.0
  *
- * @see Requests_Hooks
+ * @see WpOrg\Requests\Hooks
  */
-class WP_HTTP_Requests_Hooks extends Requests_Hooks {
+class WP_HTTP_Requests_Hooks extends WpOrg\Requests\Hooks {
 	/**
 	 * Requested URL.
 	 *