runtime: rewrite fieldmask logic with protoreflect

Replace the use of the descriptorpb when we can use reflection
instead. Also add more thorough test and support repeated fields.

Makefile

@@ -89,7 +89,8 @@ HELLOWORLD_GWSRCS=$(HELLOWORLD:.proto=.pb.gw.go)
 
 RUNTIME_TEST_PROTO=runtime/internal/examplepb/example.proto \
 	runtime/internal/examplepb/proto2.proto \
-	runtime/internal/examplepb/proto3.proto
+	runtime/internal/examplepb/proto3.proto \
+	runtime/internal/examplepb/non_standard_names.proto
 RUNTIME_TEST_SRCS=$(RUNTIME_TEST_PROTO:.proto=.pb.go)
 
 EXAMPLE_CLIENT_DIR=examples/internal/clients

examples/internal/helloworld/BUILD.bazel

@@ -30,7 +30,6 @@ go_library(
     deps = [
         "//internal/utilities:go_default_library",
         "//runtime:go_default_library",
-        "@com_github_golang_protobuf//descriptor:go_default_library_gen",
         "@com_github_golang_protobuf//proto:go_default_library",
         "@org_golang_google_grpc//:go_default_library",
         "@org_golang_google_grpc//codes:go_default_library",

examples/internal/integration/BUILD.bazel

@@ -4,7 +4,6 @@ go_test(
     name = "go_default_test",
     srcs = [
         "client_test.go",
-        "fieldmask_test.go",
         "integration_test.go",
         "main_test.go",
     ],
@@ -19,7 +18,6 @@ go_test(
         "//examples/internal/server:go_default_library",
         "//runtime:go_default_library",
         "@com_github_golang_glog//:go_default_library",
-        "@com_github_golang_protobuf//descriptor:go_default_library_gen",
         "@com_github_golang_protobuf//jsonpb:go_default_library_gen",
         "@com_github_golang_protobuf//proto:go_default_library",
         "@com_github_google_go_cmp//cmp:go_default_library",

examples/internal/proto/examplepb/BUILD.bazel

@@ -31,7 +31,6 @@ proto_library(
         "echo_service.proto",
         "flow_combination.proto",
         "generated_output.proto",
-        "non_standard_names.proto",
         "response_body_service.proto",
         "stream.proto",
         "unannotated_echo_service.proto",
@@ -74,18 +73,24 @@ go_proto_library(
 
 go_library(
     name = "go_default_library",
-    srcs = ["unannotated_echo_service.pb.gw.go"],
+    srcs = [
+        "non_standard_names.pb.go",
+        "unannotated_echo_service.pb.gw.go",
+    ],
     embed = [":examplepb_go_proto"],
     importpath = "github.com/grpc-ecosystem/grpc-gateway/v2/examples/internal/proto/examplepb",
     deps = [
         "//internal/utilities:go_default_library",
         "//runtime:go_default_library",
-        "@com_github_golang_protobuf//descriptor:go_default_library_gen",
         "@com_github_golang_protobuf//proto:go_default_library",
+        "@go_googleapis//google/api:annotations_go_proto",
+        "@io_bazel_rules_go//proto/wkt:field_mask_go_proto",
         "@org_golang_google_grpc//:go_default_library",
         "@org_golang_google_grpc//codes:go_default_library",
         "@org_golang_google_grpc//grpclog:go_default_library",
         "@org_golang_google_grpc//status:go_default_library",
+        "@org_golang_google_protobuf//reflect/protoreflect:go_default_library",
+        "@org_golang_google_protobuf//runtime/protoimpl:go_default_library",
     ],
 )