Draft: evm/kernel: implementing a generic lazy queue.

Context

This MR is related to #5766 (closed)

• Next: !10870 (merged)

This MR implements a generic lazy queue. This queue can be used to store any elements implementing Decodable and Encodable. The FallbackInbox (introduced in !10871 (closed)) uses this queue to save what has been read from the shared inbox.

Manually testing the MR

cd src/kernel_evm/kernel && cargo test

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR