Kernel/EVM: introduce fee struct for pass-through

Context

See !11512 (merged) for the why. Required for !11537 (merged).

We are adding base_fee in !11537 (merged), but also da_fee_per_byte in future. It made sense to take the chance to wrap all fees in a single parameter - to avoid having to update every occurrence on multiple MRs.

Manually testing the MR

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