check the da cache and the attester cache in responding to RPC requests (#5138)

* check the da cache and the attester cache in responding to RPC requests

* use the processing cache instead

* update comment

* add da cache metrics

* rename early attester cache method

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into check-da-cache-in-rpc-response

* make rustup update run on the runners

* Revert "make rustup update run on the runners"

This reverts commit d097e9bfa84a13b1d7813c03df38e7756fb0bfc5.

beacon_node/network/src/network_beacon_processor/rpc_methods.rs

@@ -140,7 +140,7 @@ impl<T: BeaconChainTypes> NetworkBeaconProcessor<T> {
         let requested_blocks = request.block_roots().len();
         let mut block_stream = match self
             .chain
-            .get_blocks_checking_early_attester_cache(request.block_roots().to_vec(), &executor)
+            .get_blocks_checking_caches(request.block_roots().to_vec(), &executor)
         {
             Ok(block_stream) => block_stream,
             Err(e) => return error!(self.log, "Error getting block stream"; "error" => ?e),