Improve upfront deal workflow

[alextheboredape]

Right now the contract workflow works for every edge case but it is not optimized for some common use cases. This is really bad for mainnet deals when gas is expensive. we have seen some users unhappy with the transaction costs even when they are necessary for a given pool

1. if there is no deallocation allowed and no purchase raise minimum but there is a vesting schedule we should be able to skip the settle transaction
2. if there is no deallocation allowed and no purchase raise minimum and there is also no vesting period, we can just exchange the tokens directly when they send the funds in. no need for settling or claiming.
3. if deallocation is allowed but there is no vesting period, we can exchange the tokens when settle is called

[alextheboredape]

NOTE this will seriously impact the tests which is likely the majority of the work for this ticket. We will need more tests as well