feat: MAD Precompile fuzzing

[shekohex]

Summary of changes
Changes introduced in this pull request:
This pull request includes several updates and additions to the precompiles/multi-asset-delegation module, focusing on dependency management, feature enhancements, and code refactoring. The key changes are grouped by theme as follows:

Dependency Management and Configuration:

• Added multiple optional dependencies to precompiles/multi-asset-delegation/Cargo.toml to support various features and improve modularity.
• Introduced a new fuzzing feature in precompiles/multi-asset-delegation/Cargo.toml to include dependencies required for fuzz testing.
• Created a new Cargo.toml file for the pallet-evm-precompile-multi-asset-delegation-fuzzer package to set up a fuzzer for the precompile.

Code Refactoring:

• Changed the type of AssetId from u32 to u128 across multiple files to support larger asset identifiers. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
• Updated the mock and mock_evm modules to be included when either testing or fuzzing is enabled, instead of only during tests.

Feature Enhancements:

• Added a new member precompiles/multi-asset-delegation/fuzzer to the members list in the main Cargo.toml file to include the new fuzzer package.

These changes collectively enhance the functionality, maintainability, and testability of the precompiles/multi-asset-delegation module.

Reference issue to close (if applicable)

Closes