interceptors: migrate to otel and add logging interceptor

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

example/pb/example.pb.defaults.go

@@ -0,0 +1,27 @@
+// Code generated by protoc-gen-defaults. DO NOT EDIT.
+
+package pb
+
+import (
+	"google.golang.org/protobuf/types/known/durationpb"
+	"google.golang.org/protobuf/types/known/timestamppb"
+	"google.golang.org/protobuf/types/known/wrapperspb"
+)
+
+var (
+	_ *timestamppb.Timestamp
+	_ *durationpb.Duration
+	_ *wrapperspb.BoolValue
+)
+
+func (x *HelloRequest) Default() {
+}
+
+func (x *HelloReply) Default() {
+}
+
+func (x *HelloStreamRequest) Default() {
+	if x.Count == 0 {
+		x.Count = 10
+	}
+}