Remove #[derive(Clone)] from Synchronizer

[eval-exec]

What problem does this PR solve?

I submit this PR for 2 reason:

1. I think there should be only one Synchronizer instance in CKB process. And struct BlockFetchCMD should depend on SyncState instead of Synchronizer
2. In Asynchronous Block Download and Verification #3958 , when ChainService verify a failed block, ChainService should transfer the VerifyFailedBlockInfo to Synchronizer, then Synchronizer must ban the malicious peer.

So I want to add a new field: tokio::sync::mpsc::UnboundedReceiver<VerifyFailedBlockInfo> field to the Synchronizer struct:
https://github.com/nervosnetwork/ckb/pull/3958/files#diff-66d6800da6ed28c35f087178b6e0f1b31d6fea529dd97a86f6b5ce5dda26bbfcR884-R903

But UnboundedReceiver cannot be cloned, and UnboundedReceiver's fn recv(&mut self) method need mutable self. Then I have to use Arc<Mutex< ... >> to wrap UnboundedReceiver, this is not good:

#[derive(Clone)]
pub struct Synchronizer {
    ...

    pub(crate) verify_failed_blocks_rx:
        Arc<Mutex<tokio::sync::mpsc::UnboundedReceiver<VerifyFailedBlockInfo>>>,
}

...

#[async_trait]
impl CKBProtocolHandler for Synchronizer {
    async fn poll(&mut self, nc: Arc<dyn CKBProtocolContext + Sync>) -> Option<()> {
        let mut have_malformed_peers = false;
        while let Some(malformed_peer_info) = self.verify_failed_blocks_rx.lock().recv().await {
            // ban peer
        }
    }
}

By removing #[derive(Clone)] attribute from Synchronizer, this code can be improved to this:

/// we remove derive Cone
pub struct Synchronizer {
   ...

    pub(crate) verify_failed_blocks_rx: tokio::sync::mpsc::UnboundedReceiver<VerifyFailedBlockInfo>,
}


#[async_trait]
impl CKBProtocolHandler for Synchronizer {
    async fn poll(&mut self, nc: Arc<dyn CKBProtocolContext + Sync>) -> Option<()> {
        let mut have_malformed_peers = false;
        while let Some(malformed_peer_info) = self.verify_failed_blocks_rx.recv().await {            
            // ban peer
        }
    }
}

What is changed and how it works?

What's Changed:

Related changes

• Remove #[derive(Clone)] from Synchronizer
• Make BlockFetchCMD depend on SyncState instead of Synchronizer. This means that the initialization of BlockFetchCMD will no longer require cloning the Synchronizer.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code ci-runs-only: [ quick_checks,linters ]

Side effects

• None

Release note

Title Only: Include only the PR title in the release note.