Implement option retention for Ruby

PiperOrigin-RevId: 529096272

src/google/protobuf/compiler/ruby/BUILD.bazel

@@ -20,6 +20,7 @@ cc_library(
         "//src/google/protobuf:descriptor_legacy",
         "//src/google/protobuf:protobuf_nowkt",
         "//src/google/protobuf/compiler:code_generator",
+        "//src/google/protobuf/compiler:retention",
     ],
 )
 

src/google/protobuf/compiler/ruby/ruby_generator.cc

@@ -39,6 +39,7 @@
 #include "absl/log/absl_log.h"
 #include "absl/strings/escaping.h"
 #include "google/protobuf/compiler/plugin.h"
+#include "google/protobuf/compiler/retention.h"
 #include "google/protobuf/descriptor.h"
 #include "google/protobuf/descriptor.pb.h"
 #include "google/protobuf/descriptor_legacy.h"
@@ -238,8 +239,7 @@ void EndPackageModules(int levels, io::Printer* printer) {
 }
 
 std::string SerializedDescriptor(const FileDescriptor* file) {
-  FileDescriptorProto file_proto;
-  file->CopyTo(&file_proto);
+  FileDescriptorProto file_proto = StripSourceRetentionOptions(*file);
   std::string file_data;
   file_proto.SerializeToString(&file_data);
   return file_data;