fix(notify_cancel): removed usage of async trait and made the trait dyn incompatible

[rymnc]

Linked Issues/PRs

• none

Description

The code will bloat a little more, but that's fine :_) we don't have dyn dispatch for NotifyCancel anymore.

This pull request introduces changes to the fuel-core crate, primarily focusing on enhancing the flexibility and functionality of the TaskManager and CancellationToken structures. The changes include adding a generic parameter to these structures and updating related implementations to accommodate this new parameter.

Key changes include:

Enhancements to Task Management:

• crates/fuel-core/src/service/genesis/task_manager.rs: Introduced a generic parameter N to the TaskManager and CancellationToken structures, allowing for more flexible cancellation handling. Updated the NotifyCancel trait to return a future instead of using async_trait. [1] [2] [3] [4] [5] [6]

Updates to Genesis Exporter and Importer:

• crates/fuel-core/src/service/genesis/exporter.rs: Modified the Exporter struct to include the new generic parameter N and updated its implementation accordingly.
• crates/fuel-core/src/service/genesis/importer.rs: Updated the SnapshotImporter struct to include the new generic parameter N and adjusted its implementation.

Modifications to Import Task:

• crates/fuel-core/src/service/genesis/importer/import_task.rs: Updated the run method to accept a CancellationToken with the new generic parameter N and modified the never_cancel test function to reflect this change. [1] [2] [3]

Removal of Async Trait:

• crates/fuel-core/src/lib.rs: Removed the async_trait annotation from the NotifyCancel implementation for ShutdownListener.

Checklist

• Breaking changes are clearly marked as such in the PR description and changelog
• New behavior is reflected in tests
• The specification matches the implemented behavior (link update PR if changes are needed)

Before requesting review

• I have reviewed the code myself
• I have created follow-up issues caused by this PR and linked them here

After merging, notify other teams

[Add or remove entries as needed]

• Rust SDK
• Sway compiler
• Platform documentation (for out-of-organization contributors, the person merging the PR will do this)
• Someone else?

[netrome]

Nice! Great to get rid of some dynamic dispatch.