openapi-react-query does not propagate `undefined` errors from openapi-fetch

[OliverJAsh]

openapi-fetch may return an error of value undefined, when content length is 0 and response is not okay:

openapi-typescript/packages/openapi-fetch/src/index.js

Lines 205 to 208 in d4689b1

	// handle empty content
	if (response.status === 204 || response.headers.get("Content-Length") === "0") {
	return response.ok ? { data: undefined, response } : { error: undefined, response };
	}

However, openapi-react-query does not propagate this error, because the error is only propagated when error is truthy, as per this code:

openapi-typescript/packages/openapi-react-query/src/index.ts

Lines 118 to 120 in d4689b1

	if (error) {
	throw error;
	}

To fix this, I believe this if (error) check should be if (!response.ok) and/or if ('error' in result).

We might also want to consider whether it makes sense for openapi-fetch to return undefined as an error, in the scenario mentioned above.

[kerwanp]

That makes completely sense, happy to review a PR for that!