HTTP API: Update wp_http_supports() to use Requests.

Update the capabilities check in `wp_http_supports` to use `WpOrg\Requests\Requests::has_capabilities` rather than the deprecated `WP_HTTP::_get_first_available_transport()`.

Props dd32, mukesh27, costdev, desrosj, johnbillion, jorbin, jrf, chaion07.
Fixes #37708.


git-svn-id: https://develop.svn.wordpress.org/trunk@58934 602fd350-edb4-49c9-b593-d223f7449a82

Author: peterwilsoncc

src/wp-includes/http.php

@@ -389,8 +389,6 @@ function wp_remote_retrieve_cookie_value( $response, $name ) {
  * @return bool
  */
 function wp_http_supports( $capabilities = array(), $url = null ) {
-	$http = _wp_http_get_object();
-
 	$capabilities = wp_parse_args( $capabilities );
 
 	$count = count( $capabilities );
@@ -407,7 +405,7 @@ function wp_http_supports( $capabilities = array(), $url = null ) {
 		}
 	}
 
-	return (bool) $http->_get_first_available_transport( $capabilities );
+	return WpOrg\Requests\Requests::has_capabilities( $capabilities );
 }
 
 /**