[MEX-514] compute user boosted apr

[claudiulataretu]

Reasoning

• move compute for user current boosted APR and maximum boosted APR in backend side

Proposed Changes

• added new fields currentBoostedAPR and maximumBoostedAPR for BoostedRewardsModel
• updated computes methods in farm and staking for current and maximum boosted APR specific for users
• added options to put arbitrary values for user farm amount and energy to compute APRs

How to test

query StakingBoostedRewards {
    getStakingBoostedRewardsBatch(
        stakingAddresses: [
            "erd1qqqqqqqqqqqqqpgqcedkmj8ezme6mtautj79ngv7fez978le2jps8jtawn"
        ]
    ) {
        curentBoostedAPR(
            additionalUserFarmAmount: <amount(can be negative)>
            additionalUserEnergy: <amount(can be negative)>
        )
        maximumBoostedAPR(
            additionalUserFarmAmount: <amount(can be negative)>    
        )
    }
}