fix: erc20 update total supply

[phamphong9981]

• Fix erc20 convert coin/erc20 logic: mint/burn erc20 not from erc20 module account. It is caused by normal mint/burn (openzepplin), so update address => ZERO_ADDRESS
• Update total_supply: if transfer from (to) zero => add (sub) total_supply

[phamphong9981]

• Logic convert coin/erc20: https://github.com/evmos/evmos/blob/main/x/erc20/keeper/msg_server.go
• Logic contract openzeppelin: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol