EVM/CI: publish evm kernel and preimages

What

Release reproducible evm wasm and preimages for etherlink

Why

The community needs to have access to the kernel and preimages. They can check the preimages by building them themselves.

How

Add a release tag for etherlink and publish the wasm and preimages as artifacts.

Manually testing the MR

Pushing a tag etherlink-v*.* on your own gitlab repository.

• 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