interceptors: migrate to otel and add logging interceptor

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

example/pb/example.pb.fields.go

@@ -0,0 +1,31 @@
+// Code generated by protoc-gen-defaults. DO NOT EDIT.
+
+package pb
+
+var GreeterMethods = struct {
+	SayHello       string
+	SayHelloStream string
+}{
+	SayHello:       "/helloworld.Greeter/SayHello",
+	SayHelloStream: "/helloworld.Greeter/SayHelloStream",
+}
+
+var HelloRequestFields = struct {
+	Name string
+}{
+	Name: "name",
+}
+
+var HelloReplyFields = struct {
+	Message string
+}{
+	Message: "message",
+}
+
+var HelloStreamRequestFields = struct {
+	Name  string
+	Count string
+}{
+	Name:  "name",
+	Count: "count",
+}