Support blob retrieval by versioned hash

[philknows]

Problem description

Currently getBlobSidecars supports blockId and indices, but supporting versioned_hashes (optional) would help L2s relieve a pain point of mapping.

Solution description

As identified here ,

For the existing endpoint, in the case where an L2 is able to compute the required slot from on-chain data, L2 server and CL client would both benefit from the ability to limit retrieval and transmission to only the necessary set of indices, which L2 knows by their versioned hashes. We could add another optional parameter versioned_hashes which would filter the response to a subset of blobs, just like the existing indices param: https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/blob_sidecars/blob_sidecars.yaml#L17-L25

Additional context

No response