Revert "Revert change of cloning response as bug was actually in prer…

…ender.js"

This reverts commit 5e5f30b.

Revert being stupid sveltejs#2

packages/kit/src/runtime/server/page/load_node.js

@@ -208,7 +208,8 @@ export async function load_node({
 					const proxy = new Proxy(response, {
 						get(response, key, _receiver) {
 							async function text() {
-								const body = await response.text();
+								const cloned_response = response.clone();
+								const body = await cloned_response.text();
 
 								/** @type {import('types/helper').ResponseHeaders} */
 								const headers = {};