Function convert_to_remote_write

pub async fn convert_to_remote_write(
    rc: ReqwestClient,
    node_metric: NodeMetric,
) -> (StatusCode, &'static str)

convert_to_remote_write is an expensive method due to the time it takes to submit to mimir. other operations here are optimized for async, within reason. The post process uses a single connection to mimir and thus incurs the seriliaztion delay for each metric family sent. Possible future optimizations would be to use multiple tcp connections to mimir, within reason. Nevertheless we await on each post of each metric family so it shouldn’t block any other async work in a significant way.