reenable Engine and deploy/drop payloads

[jchappelow]

This enables the Kwil engine in txapp, and reanables the deploy/drop payloads.

$  ./kwil-cli database deploy ~/test_db-nomath.kf --provider "http://127.0.0.1:8484/" --chain-id="kwil-testnet" --debug
CLI debugging enabled
DEBUG: merged config map:
chain_id -> kwil-testnet
debug -> true
private_key -> 0610bb3b2c52c4c06e9ba7a2ce2a507f618c5ca7c93b7b3e7601a7f5182b7333
provider -> http://127.0.0.1:8484/

TxHash: 6dec082afbc2279b18ebaa63fa0f6be25696ea071cbd02decc1c5d7cd3894d26
 
$  ./kwil-cli utils query-tx 6dec082afbc2279b18ebaa63fa0f6be25696ea071cbd02decc1c5d7cd3894d26
Transaction ID: 6dec082afbc2279b18ebaa63fa0f6be25696ea071cbd02decc1c5d7cd3894d26
Status: success
Height: 3
Log: success

$  ./kwil-cli database list
Databases:
  DBID: xc4503ccf15daada96e36cbbacf641f48ebc6226e28906c8757866b91
    Name: testdb
    Owner: dc18f4993e93b50486e3e54e27d91d57cee1da07

This change also removes the dummy kv payload, and the dummy tx creation from Node