Revert if prize has already been claimed

[trmid]

The claimer already handles claims that revert and continues with the rest of the batch, so there's no need to return zero in the prize pool when a double claim occurs. Instead, it can revert so the caller can know something wrong has occurred.

This change along with a related change in the Claimer contract will mitigate the prize vault hook claim reentrancy griefing attack.

[linear]

GEN-1233 [M-345] Prize claim reentrancy

[github-actions]

LCOV of commit 8ffc465 during Tests with 100% Coverage #464

Summary coverage rate:
  lines......: 100.0% (419 of 419 lines)
  functions..: 100.0% (67 of 67 functions)
  branches...: no data found

Files changed coverage rate:
                                             |Lines       |Functions  |Branches    
  Filename                                   |Rate     Num|Rate    Num|Rate     Num
  =================================================================================
  src/PrizePool.sol                          | 100%    187| 100%    36|    -      0