chore: regenerate addrbook.json for in-place-testnet (backport #21941) (#21947)

Co-authored-by: Adam Tucker <adam@osmosis.team>
Co-authored-by: Julien Robert <julien@rbrt.fr>

server/start.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"net"
 	"os"
+	"path/filepath"
 	"runtime/pprof"
 	"strings"
 	"time"
@@ -749,6 +750,17 @@ func testnetify(ctx *Context, testnetAppCreator types.AppCreator, db dbm.DB, tra
 		return nil, err
 	}
 
+	// Regenerate addrbook.json to prevent peers on old network from causing error logs.
+	addrBookPath := filepath.Join(config.RootDir, "config", "addrbook.json")
+	if err := os.Remove(addrBookPath); err != nil && !os.IsNotExist(err) {
+		return nil, fmt.Errorf("failed to remove existing addrbook.json: %w", err)
+	}
+
+	emptyAddrBook := []byte("{}")
+	if err := os.WriteFile(addrBookPath, emptyAddrBook, 0o600); err != nil {
+		return nil, fmt.Errorf("failed to create empty addrbook.json: %w", err)
+	}
+
 	// Load the comet genesis doc provider.
 	genDocProvider := node.DefaultGenesisDocProviderFunc(config)