Collection Offers v1.0: add tests when the protocol fee is non-zero

[almndbtr]

Description

Towards #125 as a part of the Community Audit.

Motivation and Context

When a collection offer is settled, there are payouts to these respective parties:

• Royalty Payout
• Protocol Fee (optional)
• Finders Fee (optional)

The integration tests cover the Royalty Payout case and the Optional Finders fee, but not the optional Protocol Fee.

This adds new assertions to the Collection Offers v1.0 integration tests when the protocol fee is 1 basis point (bps), the equivalent of 0.01%.

I chose this number based on the existing assertions defined in test/auxiliary/ZoraProtocolFeeSettings.t.sol.

How has this been tested?

In my development environment, I ran yarn test and confirmed all tests pass before opening this PR.

Checklist:

• The module includes tests written for Foundry
• The module is documented with NATSPEC
• The documentation includes UML Diagrams for external and public functions
• The module is a Hyperstructure

Reviewer Notes 👓

This takes the same approach as its sibling PR in #140 👯‍♀️