Ledger test case generator does not check for chainid

[feliam]

namada/crates/sdk/src/signing.rs

Line 1127 in e74fdc7

pub async fn to_ledger_vector(

The testcases for ledger apps generated with "to_ledger_vector" may not be checking for chain-id in the output.
Ledger apps tested with these vector may end up not showing the chain_id and users may be trick to sign mainnet tx while interacting with testnets.