Remove `std::` prefix as not all platforms have access yet. (#9095)

esphome/components/sensor/sensor.cpp

@@ -54,7 +54,7 @@ void Sensor::publish_state(float state) {
 void Sensor::add_on_state_callback(std::function<void(float)> &&callback) { this->callback_.add(std::move(callback)); }
 void Sensor::add_on_raw_state_callback(std::function<void(float)> &&callback) {
   if (!this->raw_callback_) {
-    this->raw_callback_ = std::make_unique<CallbackManager<void(float)>>();
+    this->raw_callback_ = make_unique<CallbackManager<void(float)>>();
   }
   this->raw_callback_->add(std::move(callback));
 }