Actual response error get's lost when body is not JSON in error case

[BreakBB]

When the response is not ok the fetcher tries to parse the response body as JSON:

openapi-codegen/plugins/typescript/src/templates/fetcher.ts

Lines 103 to 113 in aac52ca

	try {
	error = await response.json();
	} catch (e) {
	error = {
	status: "unknown" as const,
	payload:
	e instanceof Error
	? \`Unexpected error (\${e.message})\`
	: "Unexpected error"
	};
	}

However when the response body is not JSON or malformed, response.json() throws an "Unexpected end of JSON input" error and the original response error get's lost.