log level of metadata blob should be trace

[brenzi]

with RUST_LOG=info I get a ton of data which isn't helpful in 99% of all cases

[2023-07-20T15:03:15Z INFO  substrate_api_client::rpc::ws_client] sending request: {"id":"1","jsonrpc":"2.0","method":"state_getMetadata","params":[null]}
[2023-07-20T15:03:15Z INFO  substrate_api_client::rpc::ws_client] Got get_request_msg {"jsonrpc":"2.0","result":"0x6d6574610eb103000c1c73705f...   KILOBYTES .... .84ad03","id":"1"}

as these log messages are generic, and in general very helpful to be in info level (or maybe debug)
It may make sense to send the log to trace if the message is bigger than a certain size and only report a digest on info level