Add editions-specific conformance tests

For now, these are limited to tests of text-form for delimited fields that locks down our problematic behavior in editions.  Follow up changes will adjust the behavior to behave better under editions.

PiperOrigin-RevId: 622211473
diff --git a/csharp/generate_protos.sh b/csharp/generate_protos.sh
index 2acec5c..f3f0bc5 100755
--- a/csharp/generate_protos.sh
+++ b/csharp/generate_protos.sh
@@ -52,11 +52,13 @@
 # of protoc.
 $PROTOC -Isrc -I. \
     --experimental_allow_proto3_optional \
+    --experimental_editions \
     --csharp_out=csharp/src/Google.Protobuf.Test.TestProtos \
     --csharp_opt=file_extension=.pb.cs \
     --descriptor_set_out=csharp/src/Google.Protobuf.Test/testprotos.pb \
     --include_source_info \
     --include_imports \
+    conformance/test_protos/test_messages_edition2023.proto \
     csharp/protos/map_unittest_proto3.proto \
     csharp/protos/unittest_issues.proto \
     csharp/protos/unittest_custom_options_proto3.proto \
@@ -70,6 +72,8 @@
     csharp/protos/unittest_issue6936_b.proto \
     csharp/protos/unittest_issue6936_c.proto \
     csharp/protos/unittest_selfreferential_options.proto \
+    src/google/protobuf/editions/golden/test_messages_proto3_editions.proto \
+    src/google/protobuf/editions/golden/test_messages_proto2_editions.proto \
     src/google/protobuf/unittest_well_known_types.proto \
     src/google/protobuf/test_messages_proto3.proto \
     src/google/protobuf/test_messages_proto2.proto \