eth/filters: add global block logs cache (#25459)

This adds a cache for block logs which is shared by all filters. The cache
size of is configurable using the `--cache.blocklogs` flag.

Co-authored-by: Felix Lange <fjl@twurst.com>

ethclient/gethclient/gethclient_test.go

@@ -31,6 +31,7 @@ import (
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/eth/ethconfig"
+	"github.com/ethereum/go-ethereum/eth/filters"
 	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/ethereum/go-ethereum/node"
 	"github.com/ethereum/go-ethereum/params"
@@ -60,6 +61,12 @@ func newTestBackend(t *testing.T) (*node.Node, []*types.Block) {
 	if err != nil {
 		t.Fatalf("can't create new ethereum service: %v", err)
 	}
+	filterSystem := filters.NewFilterSystem(ethservice.APIBackend, filters.Config{})
+	n.RegisterAPIs([]rpc.API{{
+		Namespace: "eth",
+		Service:   filters.NewFilterAPI(filterSystem, false),
+	}})
+
 	// Import the test chain.
 	if err := n.Start(); err != nil {
 		t.Fatalf("can't start test node: %v", err)