Update audit report to correctly display RCV data

[umbernhard]

Currently our audit reports and data validation logic assume ballots contain binary digits for selections, so we should update it to account for ranks. Specifically, in a ballot polling audit report, two sections will need updating. First is the rounds section. Currently, it looks like this:

Round Number	Contest Name	Targeted?	Sample Size	Risk Limit Met?	P-Value	Start Time	End Time	Audited Votes
1	Pizza	Targeted	53	No	0.2256268681	2021-10-29T18:03:52.591488+00:00	2021-11-09T17:48:40.057251+00:00	Pineapple: 30	Never pineapple: 23	Ballots not found (counted for loser): 0

In a ranked-choice context, we won't have a tally at the end of the section like this, since it doesn't make sense to tally ranked ballots. A more appropriate thing would be to list the assertions we're testing against:

Round Number	Contest Name	Targeted?	Sample Size	Risk Limit Met?	P-Value	Start Time	End Time	Assertions
1	Pizza	Targeted	53	No	0.2256268681	2021-10-29T18:03:52.591488+00:00	2021-11-09T17:48:40.057251+00:00	Never pineaapple eliminated before Pineapple	Pineapple not elminated next in round 2

Additionally, the ballot-by-ballot reporting will need updating, to look more like it does in ballot comparison audits. What we have now:

Jurisdiction Name	Batch Name	Ballot Position	Ticket Numbers: Pizza	Audited?	Audit Result: Pizza
Belknap County	3	2110	Round 1: 0.000336016626577407	AUDITED	Pineapple

What we will need:

Jurisdiction Name	Batch Name	Ballot Position	Ticket Numbers: Pizza	Audited?	Audit Result: Pizza
Belknap County	3	2110	Round 1: 0.000336016626577407	AUDITED	1: Pineapple, 2: Not Pineapple

[umbernhard]

Alternatively, for the rounds section, we could do one row per assertion, since each assertion gets its own p-value. That would make it easier for others to reproduce our results.