Ensure the treasury automatically resumes once balance < cap

[stronk-dev]

What does this pull request do? Explain your changes. (required)
Ensures the treasury automatically resumes instead of setting the cut to 0% once the cap is reached. This way, it will continue accumulating as the balance depletes.

Wondering if this can be a good solution instead of raising the cap.
Note that this will cause an emitted ParameterUpdate event for the treasuryRewardCutRate after each round it flips below/above the cap.
This change does not affect the subgraph, as that is not updated to take the treasury into account at all at the moment.

Specific updates (required)

• Removes logic in reward calls which modifies nextRoundTreasuryRewardCutRate when the cap is reached.
• Modify Round init to set the cut for the current round only to 0 for as long as the cap is reached.

How did you test each of these updates (required)
N/A

Does this pull request close any open issues?
N/A

Checklist:

• README and other documentation updated
• All tests using yarn test pass

[stronk-dev]

Tests need updating for this as well.