Improve fetching era stakers

[nampc1]

• [x] Check validator list
• [x] Check validator detail
• [x] Check nominations for nominator
• [x] Check earning status for pools, validators, nominators

[haiyenvu23]

Version test : http://14.224.129.242:8900/s/LpRrepbiYpYGPDr

• [x] Wrong data

[bluezdot]

• [x] fix old bug lead to wrong data from this https://github.com/Koniverse/SubWallet-Extension/issues/3365. Please recheck Validator details info with polkadot.js @haiyenvu23.

[haiyenvu23]

Version test : http://14.224.129.242:8900/s/PK5X2S4i6ofJCrc

• [x] Re-check APY infor Actual : APY information is different from Polkadot js

[haiyenvu23]

Version test : http://14.224.129.242:8900/s/2KESoQPc368So6L Validation passed in case :

• Install/Update version
• Check validator list/validator detail with version on Store
• Re-check earning features : Stake, stake more, unstake, cancel unstake, claim reward, withdraw, liquid stake
• Handle validator APY is different from Polkadot js => Related to issue https://github.com/Koniverse/SubWallet-Extension/issues/3527