feat(starknet_sequencer_node): creating communication clients for class manager and serra compiler

[lev-starkware]

No description provided.

[reviewable-StarkWare]

This change is 

[Itay-Tsabary-Starkware]

Reviewed 8 of 8 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @lev-starkware)

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crates/starknet_sequencer_node/src/clients.rs line 127 at r1 (raw file):

    pub fn get_class_manager_shared_client(&self) -> Option<SharedClassManagerClient> {
        get_shared_client!(self, class_manager_client)
    }

Please add a todo: there are too many functions in here, we need to sort them in a meaningful way.

Two suggestions

X_local
X_shared
Y_local
Y_shared

or

X_local
Y_local
...
X_shared
Y_shared

Code quote:

    pub fn get_class_manager_shared_client(&self) -> Option<SharedClassManagerClient> {
        get_shared_client!(self, class_manager_client)
    }