Add an AT for getBlobs api with download feature enabled

[tbenr]

The new AT could look like:

1. spin up a full custody node, producing blocks (fix number of produced blobs like we do in DasCheckpointSyncAcceptanceTest)
2. spin up a non-validating node (with minimal custody requirements) with --rest-api-get-blobs-sidecars-download-enabled on*.
3. spin up a non-validating node (with minimal custody requirements) with --rest-api-get-blobs-sidecars-download-enabled off.

• at first we can check \v1/debug/beacon/data_column_sidecars/ presence on the second node and third node
• then we hit /v1/beacon/blobs/ on the second node to see that we will be able to reconstruct the blobs, while on the third node it will return 404.
• we can compare the result with blobs coming from /v1/beacon/blobs/ on the full custody node. They must match.
• we can finally check that /v1/debug/beacon/data_column_sidecars/ on secondary node now returns more sidecars.

We could even just enhance DasCheckpointSyncAcceptanceTest and just add all the checks in the same AT.