Sync from finalized (#10723)

* checkpoint sync use finalized state+block

instead of finding the block at the beginning of the weak subjectivity
epoch.

* happy path test for sync-from-finalized

* gofmt

* functional opts for the minimal e2e

* add TestCheckpointSync option

* wip: pushing for CI

* include conn index in log for debugging

* lint

* block until regular sync test finishes

* restore TestSync->testDoppelGangerProtection link

* update bazel deps for all the test targets

* updating to match current checksum from github

Co-authored-by: Kasey Kirkham <kasey@users.noreply.github.com>

testing/endtoend/helpers/helpers.go

@@ -7,10 +7,12 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"net"
 	"net/http"
 	"os"
 	"path"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"testing"
 	"time"
@@ -269,6 +271,16 @@ func NewLocalConnections(ctx context.Context, numConns int) ([]*grpc.ClientConn,
 	}, nil
 }
 
+// BeaconAPIHostnames constructs a hostname:port string for the
+func BeaconAPIHostnames(numConns int) []string {
+	hostnames := make([]string, 0)
+	for i := 0; i < numConns; i++ {
+		port := e2e.TestParams.Ports.PrysmBeaconNodeGatewayPort + i
+		hostnames = append(hostnames, net.JoinHostPort("127.0.0.1", strconv.Itoa(port)))
+	}
+	return hostnames
+}
+
 // ComponentsStarted checks, sequentially, each provided component, blocks until all of the components are ready.
 func ComponentsStarted(ctx context.Context, comps []e2etypes.ComponentRunner) error {
 	for _, comp := range comps {