Add end2end test for compatibility with dd-trace

[hansott]

Fetch in node.js is powered by undici, node requires undici when fetch is called the first time:

let fetchImpl;
// https://fetch.spec.whatwg.org/#fetch-method
ObjectDefineProperty(globalThis, 'fetch', {
  __proto__: null,
  configurable: true,
  enumerable: true,
  writable: true,
  value: function fetch(input, init = undefined) { // eslint-disable-line func-name-matching
    if (!fetchImpl) { // Implement lazy loading of undici module for fetch function
      const undiciModule = require('internal/deps/undici/undici');
      fetchImpl = undiciModule.fetch;
    }
    return fetchImpl(input, init);
  },
});

Only then will setGlobalDispatcher be available (albeit via a symbol hack)

We need to wait until setGlobalDispatcher is properly exposed: nodejs/node#43187

To be able to call setGlobalDispatcher immediately, we call fetch with an arguments and catch the error. We also need to wrap the fetch() call itself, even though there's .catch(...). This is because dd-trace throws an invalid URL error.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
library/sinks/Fetch.ts	50.00%	3 Missing ⚠️

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