providers-alloy: BeaconClient.filtered_beacon_blobs fetches and validates only necessary blobs, and does not fallback to sidecars endpoint

Cargo.toml

@@ -253,6 +253,7 @@ arbtest = "0.3.2"
 proptest = "1.9.0"
 criterion = "0.5.1"
 mockall = "0.14.0"
+httpmock = "0.8.2"
 
 # Serialization
 rkyv = "0.8.12"

crates/providers/providers-alloy/Cargo.toml

@@ -58,3 +58,5 @@ metrics = [ "dep:metrics", "kona-derive/metrics" ]
 
 [dev-dependencies]
 tokio.workspace = true
+httpmock.workspace = true
+serde_json.workspace = true