feat(blobber): Use new /blobs lighthouse endpoint to fetch blobs from CL
#58
+21
−98
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This massively simplifies CL blob fetching code. Instead of having to match blobs with versioned hashes with potential problems, we can just ask for exactly the blobs we want using the slot and versioned hashes. It reduces the entire CL fetching code to an API call.
Closes ENG-1667