chore: bump dependencies for pectra blocks

chore: add test for pectra support

docs: Correct usage of "API" in documentation

Typographical error in the file_test.go

Signed-off-by: StepSecurity Bot <[email protected]>

…ation

[StepSecurity] Apply security best practices

Implements support for the new /eth/v1/beacon/blobs/{block_id} endpoint
as an automatic fallback from the deprecated blob_sidecars endpoint when
it fails.

Key changes:

Archiver: Prefer blob_sidecars endpoint, fall back to blobs endpoint
on failure and compute KZG commitments/proofs from blob data
API: Add /eth/v1/beacon/blobs/{id} endpoint with versioned_hashes
filtering support using kzg4844.CalcBlobHashV1
Test data: Generate valid BLS12-381 field elements by reducing random
data modulo the field modulus to ensure KZG operations succeed
Test helpers: Consolidate blob generation into NewBlobSidecars with
proper header support for consistent test comparisons
Even when the blobs endpoint is used, the archiver stores complete blob
sidecars with derived KZG commitments and proofs, maintaining backward
compatibility with existing storage format.

NOTE: This code relies on attestantio/go-eth2-client#273, which has not yet
been merged. An unreleased branch is used for this dependency for now.