Enable L1 Validator Removal Using Uptime Tracking

[meaghanfitzgerald]

Goal

avalanche blockchain removeValidator currently relies on P-Chain transactions to forcefully remove validators from the chosen L1. removeValidator should have this as an option, but instead default to the removing a Validator via the validation manager smart contract using valid uptime proofs. This would also enable an L1 validator to claim any validation rewards.

Assumptions and Scope

• The CLI is able to retrieve valid uptime proofs from Subnet-EVM's uptime endpoints
• The validator was either originally added via the CLI with avalanche blockchain addValidator or the user has the validation params available to provide
• The CLI checks for potential rewards, and displays the estimated reward before asking "do you wish to proceed with validator removal?"

Requirements

• The CLI checks for existing L1 configurations, and if they don't exist, prompts the user for the L1 params necessary to initiate and confirm a validator removal via the smart contract

Open Questions

NA