Tech: Changes - Account Type to Account Address Only

[andy-shi88]

Description

Big Changes:

We'll remove account type and proceed only with account address

Breakdown

• remove usages of account_type and account_id
• add *_account_address_length on transaction header
• signature validation will need to be updated accordingly
• kill the functionality that generates account id
• update transaction validation rule related to account id checking
• remove account table and its usages
• update wiki

Additional Diagram / File

Put additional diagram or file