Gloas: fix test failures (KZG verifier wiring, harness columns, WSS sync)

Brings the FORK_NAME=gloas beacon_chain test suite from 31 failures to green:

- v1 KZG batch verifier couldn't verify Gloas columns. Added
  verify_columns_against_block helper that picks commitments per fork
  (Fulu: inline on column; Gloas: signed_execution_payload_bid).
- BeaconChainHarness::process_envelope didn't persist columns. Now mirrors
  what production does in import_available_execution_payload_envelope.
- get_or_reconstruct_blobs returned an error for Gloas. Now short-circuits to
  Ok(None); WSS test copies columns from source to dest directly.
- update_data_column_signed_header (block_verification tests) only handled
  Fulu shape. Added a Gloas branch that re-keys to canonical_root.
- BlockError::EnvelopeBlockRootUnknown changed to tuple variant.
- Removed duplicate process_payload_envelope_availability.

beacon_node/network/src/network_beacon_processor/gossip_methods.rs

@@ -1848,7 +1848,7 @@ impl<T: BeaconChainTypes> NetworkBeaconProcessor<T> {
             // BlobNotRequired is unreachable. Only constructed in `process_gossip_blob`
             Err(e @ BlockError::InternalError(_))
             | Err(e @ BlockError::BlobNotRequired(_))
-            | Err(e @ BlockError::EnvelopeBlockRootUnknown { .. })
+            | Err(e @ BlockError::EnvelopeBlockRootUnknown(_))
             | Err(e @ BlockError::OptimisticSyncNotSupported { .. }) => {
                 error!(error = %e, "Internal block gossip validation error");
                 return None;