use explicity structs and innervm calls

[ceyonur]

Why this should be merged

There were few reviews in #1009 after it was merged. This PR intends to responde those.

How this works

This pull request refactors the atomic sync components in the EVM plugin to improve clarity and maintainability. Key changes include renaming internal types to exported ones, enhancing comments for better documentation, and updating initialization logic to align with the new architecture.

Refactoring of sync components:

• plugin/evm/atomic/sync/extender.go: Renamed extender to Extender and updated comments to clarify its role as the sync extender for the atomic VM. Updated methods to align with the new exported type. [1] [2] [3]

• plugin/evm/atomic/sync/summary_provider.go: Renamed summaryProvider to SummaryProvider and updated comments to describe its role in providing state summaries for the atomic trie. Adjusted initialization logic to match the new exported type.

Updates to VM initialization logic:

• plugin/evm/atomic/vm/vm.go: Updated initialization of sync.Extender and sync.SummaryProvider to use exported types. Adjusted initialization of dependent components (atomicBackend, atomicTrie, and leafHandler) to improve clarity and consistency. [1] [2]

Minor corrections:

• plugin/evm/atomic/sync/leaf_handler.go: Fixed a typo in the comment for NewLeafHandler ("uninitialzied" → "uninitialized").

• plugin/evm/atomic/vm/vm.go: Corrected the method call to set the extension configuration from vm.SetExtensionConfig to vm.InnerVM.SetExtensionConfig for proper delegation.

How this was tested

Existing tests

Need to be documented?

No

Need to update RELEASES.md?

No