Aborted requests should be rejected with AbortSignal.reason

[u873838]

The current behavior of aborted request cause the promise to reject with a simple Error. e.g.:

smithy-typescript/packages/node-http-handler/src/node-http-handler.ts

Lines 171 to 173 in efcbbf4

	const abortError = new Error("Request aborted");
	abortError.name = "AbortError";
	reject(abortError);

smithy-typescript/packages/node-http-handler/src/node-http-handler.ts

Lines 249 to 251 in efcbbf4

	const abortError = new Error("Request aborted");
	abortError.name = "AbortError";
	reject(abortError);

This makes error handling more difficult, as the caller does not know which AbortSignal e.g. when used with AbortSignal.any caused the request to be aborted.

I recommend changing the code to reject with AbortSignal.reason when an AbortSignal is aborted (at least for native AbortSignal implementations).