Tests: Bring some consistency to mocking HTTP requests in unit tests.

Includes:
* Renaming the `$preempt` parameter to `$response` in the `pre_http_request` filter to better match the context used in callbacks (returning the original value if the conditions are not met rather than preempting the request).
* Synchronizing parameter names and types in various `pre_http_request` callbacks in unit tests.

Follow-up to [34509], [37907], [40628], [40629], [45667], [46175], [48242], [48462], [49904], [51021], [51973], [52146], [52382], [54043], [54968].

See #56793, #56792.
Built from https://develop.svn.wordpress.org/trunk@55029


git-svn-id: http://core.svn.wordpress.org/trunk@54562 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-http.php

@@ -251,7 +251,7 @@ class WP_Http {
 		 *
 		 * @since 2.9.0
 		 *
-		 * @param false|array|WP_Error $preempt     A preemptive return value of an HTTP request. Default false.
+		 * @param false|array|WP_Error $response    A preemptive return value of an HTTP request. Default false.
 		 * @param array                $parsed_args HTTP request arguments.
 		 * @param string               $url         The request URL.
 		 */

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-55028';
+$wp_version = '6.2-alpha-55029';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.