stop using wrong = True and introduce expect

[yosupo06]

ref #823

The usage of wrong = True of info.toml is unclear. This PR would

• remove wrong = True
• introduce new config, expect = 'XX'

If we set expect = 'WA' for a solution, this solution have to got 'WA' for at least 1 case.

Formally,

Let

• $S$ be the set of the status of the solution of each testcases.
• $e$ be the status that is specified by expect config.
• $A$ be the set of status that is specified by actual_re, actual_tle, actual_wa configs.

The following conditions have to be satisfied:

• when the solution have an expect config
  • $e \in S$
  • $S \subseteq (\mathrm{'AC'} \cup A \cup {e})$
• does not have an expect config
  • $S \subseteq (\mathrm{'AC'} \cup A)$