[Protobuf] Absorb protobuf::MultiFileErrorCollector change 2 (#35898)

Additional touch on top of https://github.com/grpc/grpc/pull/35870

Closes #35898

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/35898 from veblush:protobuf-sv 3b8410b6f6
PiperOrigin-RevId: 606699149

test/cpp/util/proto_file_parser.cc

@@ -48,16 +48,16 @@ class ErrorPrinter : public protobuf::compiler::MultiFileErrorCollector {
  public:
   explicit ErrorPrinter(ProtoFileParser* parser) : parser_(parser) {}
 
-  void AddError(const std::string& filename, int line, int column,
-                const std::string& message) override {
+  void RecordError(absl::string_view filename, int line, int column,
+                   absl::string_view message) override {
     std::ostringstream oss;
     oss << "error " << filename << " " << line << " " << column << " "
         << message << "\n";
     parser_->LogError(oss.str());
   }
 
-  void AddWarning(const std::string& filename, int line, int column,
-                  const std::string& message) override {
+  void RecordWarning(absl::string_view filename, int line, int column,
+                     absl::string_view message) override {
     std::cerr << "warning " << filename << " " << line << " " << column << " "
               << message << std::endl;
   }

tools/distrib/python/grpcio_tools/grpc_tools/main.cc

@@ -108,13 +108,13 @@ class ErrorCollectorImpl : public MultiFileErrorCollector {
       : errors_(errors), warnings_(warnings) {}
 
   void RecordError(absl::string_view filename, int line, int column,
-                   absl::string_view message) {
+                   absl::string_view message) override {
     errors_->emplace_back(std::string(filename), line, column,
                           std::string(message));
   }
 
   void RecordWarning(absl::string_view filename, int line, int column,
-                     absl::string_view message) {
+                     absl::string_view message) override {
     warnings_->emplace_back(std::string(filename), line, column,
                             std::string(message));
   }