[SERVICES-2682] Fix staking outdated contracts

[mad2sm0key]

Reasoning

• the userOutdatedContracts query always returns a result for positions in staking farms where the rewards have stopped

Proposed Changes

• add early exit if the contract is not producing rewards in the compute method for outdated staking contracts
• fix isProducingRewards method and usage in staking compute
• add caching to isProducingRewards method

How to test

• the query should not return a result if the user has a position in a staking farm that is no longer producing rewards

query {
  userOutdatedContracts {
    address
    type
    claimProgressOutdated
    farmToken 
  }
}

[cfaur09]

Tested 🟢