use old for each syntax

Author: mattmacf98

src/viam/sdk/components/private/arm_client.cpp

@@ -111,8 +111,8 @@ std::map<std::string, mesh> ArmClient::get_3d_models(const ProtoStruct& extra) {
         .with(extra)
         .invoke([](auto& response) {
             std::map<std::string, mesh> models;
-            for (const auto& [key, value] : response.models()) {
-                models.emplace(key, from_proto(value));
+            for (const auto& entry : response.models()) {
+                models.emplace(entry.first, from_proto(entry.second));
             }
             return models;
         });

src/viam/sdk/components/private/arm_server.cpp

@@ -142,8 +142,8 @@ ::grpc::Status ArmServer::Get3DModels(::grpc::ServerContext*,
         "ArmServer::Get3DModels", this, request)([&](auto& helper, auto& arm) {
         const std::map<std::string, mesh> models = arm->get_3d_models(helper.getExtra());
 
-        for (const auto& [key, mesh] : models) {
-            response->mutable_models()->insert({key, to_proto(mesh)});
+        for (const auto& entry : models) {
+            response->mutable_models()->insert({entry.first, to_proto(entry.second)});
         }
     });
 }