Make MAX_REQUEST_BLOB_SIDECARS and MAX_BLOBS_PER_BLOCK configurable

[ensi321]

Problem description

In ethereum/consensus-specs#3817, MAX_BLOBS_PER_BLOCK is moved from preset to config.

This poses a challenge in Lodestar since BlobSidecarsByRootRequest - a fixed length ssz container depends on it but types package has no access to chain.config.

Solution description

I believe this is the only place in the spec has a ssz container for which its definition relies on a variable from config.

We can either make a one time exception and define BlobSidecarsByRootRequest ssz in beacon-node or further refactor to be more future proof if such scenario happens again.

cc. @g11tech

Additional context

No response