Fix/ledger support

[Galadrin]

Description

With the current binary (evm v0.4.2), we are not able to use Ledger.
patch made on the branch feat/fork-v0.4.2 and rebased to main

After this patch is applied, we are able to sign and verify a transaction
But the transaction is rejected by the RPC if it doesn't have the fix.

~/go/bin/kiichaind tx staking create-validator validator.json  --from validator --gas-prices 333333333akii --gas-adjustment 1.3 --gas="auto" --sign-mode amino-json --chain-id kiichain_1783-1 --generate-only > /tmp/test_unsigned_ledger_only.json
gas estimate: 263750

~/go/bin/kiichaind tx sign /tmp/test_unsigned_ledger_only.json --from validator --chain-id kiichain_1783-1 --ledger --output-document /tmp/sig_ledger0.json
Generating payload, please check your Ledger...
Signing the following payload with EIP-712:
- Domain: 0x857D23F003A8F85CD56740ED5213ADC2FFC7F43DBA482B3DF997CF9ECC387500
- Message: 0x7CD80E63EBC2CACC4CB41FE50FC2D1E4D8E3A3ABFDFADE2FB8F2294AEE1D3513

~/go/bin/kiichaind tx validate-signatures  /tmp/sig_ledger0.json --chain-id kiichain_1783-1
Signers:
  0: kii13ew33d4tur5xe3aap89ehcegqy5e6085a9q480

Signatures:
  0: kii13ew33d4tur5xe3aap89ehcegqy5e6085a9q480      [OK]

~/go/bin/kiichaind tx broadcast  /tmp/sig_ledger0.json --chain-id kiichain_1783-1
code: 4
codespace: sdk
data: ""
events: []
gas_used: "0"
gas_wanted: "0"
height: "0"
info: ""
logs: []
raw_log: 'signature verification failed; please verify account number (51), sequence
  (0) and chain-id (kiichain_1783-1): unauthorized'
timestamp: ""
tx: null
txhash: 3B1144EFCB6257EB24168EDC30ABC8090669245E3FCFC4092566CE1F61FC2153

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