Runtime rpc request sizes (#4841)

* add runtime variable list type

* add configs to ChainSpec

* git rid of max request blocks type

* fix tests and lints

* remove todos

* git rid of old const usage

* fix decode impl

* add new config to `Config` api struct

* add docs fix compilt

* move methods for per-fork-spec to chainspec

* get values off chain spec

* fix compile

* remove min by root size

* add tests for runtime var list

---------

Co-authored-by: Jimmy Chen <jchen.tc@gmail.com>

beacon_node/store/src/hot_cold_store.rs

@@ -40,7 +40,6 @@ use std::path::Path;
 use std::sync::Arc;
 use std::time::Duration;
 use types::blob_sidecar::BlobSidecarList;
-use types::consts::deneb::MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS;
 use types::*;
 
 /// On-disk database that stores finalized states efficiently.
@@ -2055,7 +2054,7 @@ impl<E: EthSpec, Hot: ItemStore<E>, Cold: ItemStore<E>> HotColdDB<E, Hot, Cold>
         let min_current_epoch = self.get_split_slot().epoch(E::slots_per_epoch()) + 2;
         let min_data_availability_boundary = std::cmp::max(
             deneb_fork_epoch,
-            min_current_epoch.saturating_sub(MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS),
+            min_current_epoch.saturating_sub(self.spec.min_epochs_for_blob_sidecars_requests),
         );
 
         self.try_prune_blobs(force, min_data_availability_boundary)