Try to use mutable filter source names

Author: hexbabe

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

@@ -134,8 +134,11 @@ Camera::image_collection CameraClient::get_images(std::vector<std::string> filte
     return make_client_helper(this, *stub_, &StubType::GetImages)
         .with(extra,
               [&](auto& request) {
-                  for (const auto& source_name : filter_source_names) {
-                      *request.add_filter_source_names() = source_name;
+                  if (!filter_source_names.empty()) {
+                      request.mutable_filter_source_names()->Reserve(filter_source_names.size());
+                      for (auto& source_name : filter_source_names) {
+                          request.add_filter_source_names(std::move(source_name));
+                      }
                   }
               })
         .invoke([](auto& response) { return from_proto(response); });