refactor(rpc-call): Never return <wasm:stripped> from rpc calls

[breathx]

These changes formalise error output of calculate gas calls:

• Internal errors (that are supposed to be unreachable) if occur will be thrown as "Internal error: entered unreachable code '{ERROR EXPLANATION}'"
• 🥳 Rpc calls no longer return <wasm:stripped>, that happened to be in case of underlying extrinsic failure. Instead, it returns name of the error occurred.
• In case of non pallet-gear error returned it will contain pallet/module index within the runtime of the chain to resolve name collision.

Before

curl http://testnet.vara.network:9944 -H "Content-Type:application/json;charset=utf-8" -d "{
    \"jsonrpc\":\"2.0\",
    \"id\":1,
    \"method\":\"gear_calculateInitCreateGas\",
    \"params\": [
        \"0x0000000000000000000000000000000000000000000000000000000000000000\",
        \"0x0000000000000000000000000000000000000000000000000000000000000000\",
        \"\",
        0,
        true
    ]
}"
{"jsonrpc":"2.0","error":{"code":8000,"message":"Runtime error","data":"\"Internal error: create_program failed with '<wasm:stripped>'\""},"id":1}%   

Now

curl http://localhost:9944 -H "Content-Type:application/json;charset=utf-8" -d "{
    \"jsonrpc\":\"2.0\",
    \"id\":1,
    \"method\":\"gear_calculateInitCreateGas\",
    \"params\": [
        \"0x0000000000000000000000000000000000000000000000000000000000000000\",
        \"0x0000000000000000000000000000000000000000000000000000000000000000\",
        \"\",
        0,
        true
    ]
}"
{"jsonrpc":"2.0","error":{"code":8000,"message":"Runtime error","data":"Extrinsic `gear.create_program` failed: 'CodeDoesntExist'"},"id":1}