Update DPoS module

[ManuGowda]

LIP

• Add dynamic reward LIP
• Add reward sharing LIP

Motivation

• Update DPoS module interface changes
• Update terminology to DPoS domain
• Ensure dynamic block rewards are indexed
• Expose endpoints related to reward sharing

Tasks

Sprint 68

• Update DPoS constants endpoint #1281
• Update Fees endpoint #1355
• Update DPoS Unlocks endpoint #1350
• Update DPoS Received Votes endpoint #1349
• Update DPoS Sent Votes endpoint #1348
• Create PoS Locked Rewards endpoint #1351

Sprint 69

• Create PoS Claimable Rewards endpoint #1352
• Create Reward Default endpoint #1353
• Create Reward Constants endpoint #1356
• Create Reward Inflation endpoint #1354
• Update DPoS delegates endpoint #1347

Additional Information

@sameersubudhi once we have objective planning we can update the motivation and create GitHub issues to address