Lazily parse the field options descriptor

This avoids a parsing cycle where fields on FieldOptions have options set on
themselves.

PiperOrigin-RevId: 518335401

Author: kevinoconnor7

protobuf/runtime/src/com/google/protobuf/Descriptors.m

@@ -358,7 +358,6 @@ - (instancetype)initWithData:(CGPFieldData *)data
     data_ = data;
     tag_ = TagFromData(data);
     javaType_ = [GetTypeObj(data->type)->javaType_ ordinal];
-    fieldOptions_ = InitFieldOptions(data->optionsData);
     containingType_ = containingType;
     CGPFieldFixDefaultValue(self);
   }
@@ -425,6 +424,9 @@ - (id)getDefaultValue {
 - (ComGoogleProtobufDescriptorProtos_FieldOptions *)getOptions {
   if (fieldOptions_ != nil) {
     return fieldOptions_;
+  } else if (data_->optionsData != NULL) {
+    fieldOptions_ = InitFieldOptions(data_->optionsData);
+    return fieldOptions_;
   } else {
     return [ComGoogleProtobufDescriptorProtos_FieldOptions getDefaultInstance];
   }