feat: More E2E Tests

[shekohex]

Summary of changes
Changes introduced in this pull request:

This pull request includes several changes to improve the handling of ERC20 assets, session management, and the overall functionality of the multi-asset delegation pallet. The most important changes include the addition of a new precompile utility, updates to session handling, and various refactorings to simplify the codebase and enhance functionality.

ERC20 Asset Handling Enhancements:

• Added a new precompile utility precompiles/erc20-utils to the project (Cargo.toml). [1] [2]
• Refactored the process_execute_withdraw function to handle ERC20 assets using precompiles and removed redundant EVM address handling. (pallets/multi-asset-delegation/src/functions/deposit.rs) [1] [2]

Session Management Improvements:

• Introduced RoundChangeSessionManager to handle round changes during new sessions. (pallets/multi-asset-delegation/src/lib.rs)
• Updated session manager configuration to use RoundChangeSessionManager. (pallets/multi-asset-delegation/src/mock.rs)

Code Refactoring and Simplification:

• Removed optional workspace dependencies for pallet-session and sp-staking. (pallets/multi-asset-delegation/Cargo.toml)
• Simplified the handle_round_change function and removed unnecessary return types. (pallets/multi-asset-delegation/src/functions/session_manager.rs) [1] [2]

New Functionalities:

• Added a new function ready_withdraw_requests to return an iterator over withdraw requests ready for execution. (pallets/multi-asset-delegation/src/functions/deposit.rs)
• Implemented a new test to verify round changes on new sessions. (pallets/multi-asset-delegation/src/tests/session_manager.rs)

Minor Changes:

• Modified the workflow to include the fast-runtime feature in the end-to-end test suite. (.github/workflows/checks.yml)
• Added necessary imports and updated function signatures to improve code clarity and functionality. (pallets/multi-asset-delegation/src/functions.rs)

Implemented test cases

1. Withdraw restaked assets in ERC20
2. Withdraw restaked assets with custom asset ids.

Reference issue to close (if applicable)

Closes #868
Part of #861