Correctly return `Expired` from `Status` query in ics10-grandpa-cw contract

[vmarkushin]

Use env.block.time - consensus_state.timestamp together with expired function of the client
Code:

composable-ibc/light-clients/ics10-grandpa-cw/src/contract.rs

Line 354 in 02ce69e

Ok(_) => to_binary(&QueryResponse::status("Active".to_string())),