Move sign methods back into eip155:x (#27771)

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## **Related issues**

See: MetaMask/MetaMask-planning#3483

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app/scripts/lib/multichain-api/scope/scope.ts

@@ -20,11 +20,6 @@ export const KnownWalletRpcMethods: string[] = [
 ];
 const WalletEip155Methods = [
   'wallet_addEthereumChain',
-  'personal_sign',
-  'eth_signTypedData',
-  'eth_signTypedData_v1',
-  'eth_signTypedData_v3',
-  'eth_signTypedData_v4',
 ];
 
 const Eip155Methods = MetaMaskOpenRPCDocument.methods

test/e2e/run-api-specs-multichain.ts

@@ -72,8 +72,6 @@ async function main() {
       ];
       const walletEip155Methods = [
         'wallet_addEthereumChain',
-        'personal_sign',
-        'eth_signTypedData_v4',
       ];
 
       const ignoreMethods = [