Feat: Add willPunishExpenditureStaker field to colony motion

[jakubcolony]

Small PR to unblock colonyCDapp#3322 which needs to be able to tell if a motion cancelling staked expenditure will also punish its creator or not.

Testing

• Check out feat/cancel-exp-motion-field in CDapp and start your dev env as usual.
• Install and enable Voting Reputation
• Create an expenditure and progress it past the Review stage
• From the three dot menu, select the cancel option
• Select Reputation as decision method and try both cases: penalising and not penalising the expenditure creator

Run the following query to check the value of willPunishExpenditureStaker field:

query Motions {
  listColonyActions(filter: {type: {eq: CANCEL_EXPENDITURE_MOTION}}) {
    items {
      id
      motionData {
        willPunishExpenditureStaker
      }
    }
  }
}

[rdig]

Changes look sensible. Good to go.