feat(dAppStaking): Move actions mechanisms for bonus rewards

[ipapandinas]

⚠️ A fix for the code coverage job is proposed here: #1408

Pull Request Summary

This PR introduces enhancements to the bonus reward eligibility mechanism and implements robust handling for stake movement, particularly during the build&earn subperiod.

Bonus Reward Eligibility

The previously used loyal_staker flag is replaced with and decoded into a bonus_status enum:

enum BonusStatus {
    /// Bonus rewards are forfeited.
    BonusForfeited,
    /// Bonus rewards are preserved with a value which is the number of remaining 'safe moves' allowed in the ongoing B&E subperiod.
    SafeMovesRemaining(u8),
}

This update:

• Introduces tracking of bonus status to ensure eligibility based on the number of allowed move actions (MaxBonusMovesPerPeriod).
• Enforces forfeiture of bonus eligibility if move actions exceed the allowable threshold.

Move action

A move action is defined as either:

• Partial unstaking that reduces the 'voting stake'.
• Transfers of 'voting stake' between contracts.

If a move action is performed during the build&earn subperiod, the bonus_status attached to the relevant singular staking info is reduced until it is forfeited.

Stake Movement Enhancements

A new move_stake extrinsic is implemented. It is similar to an 'unstake' followed by two 'stakes' for each subperiod. Existing safeguards are extended additional checks to:

• Ensure the source and destination contracts are different.
• Validate the amount to be moved.

When moving stake from unregistered contracts, the bonus status is always preserved.

Migration

A multi-block migration is proposed to convert all existing loyal_staker flags to their respective BonusStatus variants:

• BonusStatus::SafeMovesRemaining(0) for true.
• BonusStatus::BonusForfeited for false.

Closes #1379

Check list

• added or updated unit tests
• updated Astar official documentation
• added OnRuntimeUpgrade hook for precompile revert code registration
• added benchmarks & weights for any modified runtime logics.
• add E2E tests
• prepare follow-up issue for Astar Portal frontend & forum post

[ipapandinas]

/bench shibuya-dev pallet_dapp_staking

[github-actions]

Benchmarks job is scheduled at https://github.com/AstarNetwork/Astar/actions/runs/12753557202.
Please wait for a while.
Branch: feat/move_bonus_dapp_staking
SHA: d94b330

[github-actions]

Benchmarks have been finished.
You can download artifacts if exists https://github.com/AstarNetwork/Astar/actions/runs/12753557202.