Use Response.url in Wasm stack traces

This tests that the DevTools utilize the Response.url property when generating a Wasm entry in a stack trace, for example in Error#stack.

Steps

1. Open DevTools
2. Go to the Console
3. The first line should read response-url-stack.wat.throwError (https://wasm-dbg-stories.netlify.org/response-url-stack.wasm:wasm-function[0]:0x2a)