[#276] Merge repo with frostfs-api-go

Signed-off-by: Pavel Pogodaev <p.pogodaev@yadro.com>

api/util/proto/encoding/compat.go

@@ -0,0 +1,22 @@
+package encoding
+
+import (
+	_ "google.golang.org/grpc/encoding/proto" // Ensure default codec is registered before our one.
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/protoadapt"
+)
+
+// messageV2Of converts v to a proto.Message.
+// This is needed for this library to continue working in presence of external gRPC packages,
+// such as opentelemetry gRPC exporter.
+// Copied from https://github.com/grpc/grpc-go/blob/e524655becd8d4c7ba9e8687faef456e495e341e/encoding/proto/proto.go#L59.
+func messageV2Of(v any) proto.Message {
+	switch v := v.(type) {
+	case protoadapt.MessageV1:
+		return protoadapt.MessageV2Of(v)
+	case protoadapt.MessageV2:
+		return v
+	}
+
+	return nil
+}