Use constructor parameter for ERC20 Premint

[frangio]

Currently ownership and roles are assigned to msg.sender, which is a problem for factory contracts. We can have a toggle to use a constructor parameter instead.

[defido]

This would be a great addition, there's a lot of factory contracts that could help projects, but currently setting ownership with OZ is problematic.

[ericglau]

This was changed to use a constructor parameter for most cases. The only remaining scenario is the recipient of ERC20's Premint amount -- this could also use a constructor parameter to be consistent.