proxy: upload consumption events to S3 (#7213)

## Problem

If vector is unavailable, we are missing consumption events.

https://github.com/neondatabase/cloud/issues/9826

## Summary of changes

Added integration with the consumption bucket.

proxy/src/serverless/sql_over_http.rs

@@ -44,6 +44,7 @@ use crate::metrics::HTTP_CONTENT_LENGTH;
 use crate::metrics::NUM_CONNECTION_REQUESTS_GAUGE;
 use crate::proxy::NeonOptions;
 use crate::serverless::backend::HttpConnError;
+use crate::usage_metrics::MetricCounterRecorder;
 use crate::DbName;
 use crate::RoleName;