Update initialize user accounts for block generators / Fees in sidechains

[shuse2]

Description

Update user account initializaiton and fee handling according to the LIP PR.

• Add REWARD_REDUCTION_NO_ACCOUNT for dynamic reward and reward module and check if block generator does not exist, it should return zero reward with event
• Add maxBlockHeightZeroFeePerByte in the config default to 0, and during the fee verification allow to have zero fee below this height
• Add user account check in fee module afterCommandExecute and if not, burn or transfer whole fee

Acceptance Criteria

All tests are updated according to the change