Archive state optimization

[twoeths]

Problem description

Right now we archive state using BeaconState.serialize() which is not optimized, see https://github.com/ChainSafe/lodestar/blob/unstable/packages/state-transition/test/perf/util/serializeState.test.ts#L20

Solution description

• always serialize state using state.serializeToBytes() api
• use preallocated buffer pool , similar to what PersistentCheckpointStateCache does https://github.com/ChainSafe/lodestar/blob/rc/v1.19.0/packages/beacon-node/src/util/bufferPool.ts

Additional context

No response

[twoeths]

should be done after we turn on n-historical state by default
then we have a bufferPool on chain to be used for archiving state too

[twoeths]

we done need this considering #7005