feat: add validation for complete-deposit transactions

[djordon]

Description

Closes #479.

Changes

• Change the AsContractCall::validate function to have a different signature.
• Implement the CompleteDepositV1::validate function.
• Added some fields to the CompleteDepositV1 struct. These new parameters should be used in the contract call once feat: check against known burn hash when completing deposit #493 gets updated and lands.
• Fix a bunch of random typos that I spotted.

Note that when #543 gets done we'll probably want to add another integration test, but the logic introduced here should be correct and won't need much updating (famous last words).

Testing Information

This PR adds integration tests that checks for each of the failure modes in the function.

Checklist:

• I have performed a self-review of my code

[djordon]

These sporadic errors seem to be unrelated to the changes in this PR.

[djordon]

Ugh, I forgot to check the signer bitmap. Will update tomorrow.

There is no bitmap, I'm going to bed.