fix: fix submitClaims + add Claims.depositRetrieved field

[rackstar]

Description

• fix submitClaim
• add ClaimAlreadyPaidOut error on submitClaim
• add Claims.depositRetrieved field
• add isAssessor viewer
• add retrieveDeposit unit tests

Testing

• unit tests

Checklist

• Performed a self-review of my own code
• Made corresponding changes to the documentation

[rackstar]

the "non-assessor" require in TC.removeFromWhitelist will be added by @MilGard91 when he adds the registry dependency to TC:

  function removeFromWhitelist(address _member) public override onlyInternal {
  
    require(token.balanceOf(_member) == 0, MemberBalanceNotZero());
    
    uint memberId = registry.getMemberId(_member);
    require(!assessment().isAssessor(memberId), MustNotBeAssessorToLeave());
    
    token.removeFromWhiteList(_member);
  }

[shark0der]

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