refactor: Refactor fee-related types

[slowli]

What ❔

• Moves basic logic for fee types close to the type declaration (i.e., to zksync_types).
• Unifies PubdataSendingMode and PubdataDA.
• Removes dependency of zksync_types on zksync_config.

Why ❔

This allows external apps depending on fee types (e.g., the test node) to not have behemoths like zksync_dal in their dependency graph.

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via zkstack dev fmt and zkstack dev lint.