Tests: Use wp_parse_url() in plugin management REST API endpoint tests.

This resolves a warning in preparation for updating to WPCS 3.4.0:
{{{
Silencing errors is strongly discouraged. Use proper error checking instead.
}}}

Additionally, this brings consistency with a similar fragment in the pattern directory endpoint tests, which already used `wp_parse_url()`.

Follow-up to [48242], [51021].

See #64894.

git-svn-id: https://develop.svn.wordpress.org/trunk@62795 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

tests/phpunit/tests/rest-api/rest-block-directory-controller.php

@@ -273,7 +273,7 @@ private function prevent_requests_to_host( $blocked_host = 'api.wordpress.org' )
 		add_filter(
 			'pre_http_request',
 			static function ( $response, $parsed_args, $url ) use ( $blocked_host ) {
-				if ( @parse_url( $url, PHP_URL_HOST ) === $blocked_host ) {
+				if ( wp_parse_url( $url, PHP_URL_HOST ) === $blocked_host ) {
 					return new WP_Error( 'plugins_api_failed', "An expected error occurred connecting to $blocked_host because of a unit test", "cURL error 7: Failed to connect to $blocked_host port 80: Connection refused" );
 
 				}

tests/phpunit/tests/rest-api/rest-plugins-controller.php

@@ -1167,7 +1167,7 @@ private function prevent_requests_to_host( $blocked_host = 'api.wordpress.org' )
 		add_filter(
 			'pre_http_request',
 			static function ( $response, $parsed_args, $url ) use ( $blocked_host ) {
-				if ( @parse_url( $url, PHP_URL_HOST ) === $blocked_host ) {
+				if ( wp_parse_url( $url, PHP_URL_HOST ) === $blocked_host ) {
 					return new WP_Error( 'plugins_api_failed', "An expected error occurred connecting to $blocked_host because of a unit test", "cURL error 7: Failed to connect to $blocked_host port 80: Connection refused" );
 
 				}