Inconvenience onFlow location config

[katopz]

refer to

genkit/js/plugins/firebase/src/functions.ts

Lines 82 to 86 in 4d831e4

	const responseJson = await callHttpsFunction(
	flow.name,
	await getLocation(),
	data,
	streamingCallback

I don't think it's a good idea to use env here via await getLocation() (why we need await anyway?)

export function getLocation() {
  return process.env['GCLOUD_LOCATION'] || 'us-central1';
}

May be we can just pass location: string,in config? e.g.

interface FunctionFlowConfig<
  I extends z.ZodTypeAny,
  O extends z.ZodTypeAny,
  S extends z.ZodTypeAny,
> {
  name: string;
  inputSchema?: I;
  outputSchema?: O;
  authPolicy: FunctionFlowAuth<I>;
  streamSchema?: S;
  httpsOptions?: HttpsOptions;
  enforceAppCheck?: boolean;
  consumeAppCheckToken?: boolean;
  location?: string; 👈
}

and

        const responseJson = await callHttpsFunction(
          flow.name,
          config.location || 'us-central1',
          data,
          streamingCallback
        );

Thanks