Signing a transaction prints the rich output even when passing `--quiet`

#1604 is signing transactions and forcing logging to be non-quiet.

https://github.com/stellar/stellar-cli/blob/116047030ba4044282b36cd1ad7f50b9faeaaf91/cmd/soroban-cli/src/config/mod.rs#L94

This should respect the `--quiet` argument.