Avoid thrust vector initialization. (#10544)

* Avoid thrust vector initialization.

- Add a wrapper for rmm device uvector.
- Split up the `Resize` method for HDV.

include/xgboost/host_device_vector.h

@@ -135,7 +135,9 @@ class HostDeviceVector {
 
   void SetDevice(DeviceOrd device) const;
 
-  void Resize(size_t new_size, T v = T());
+  void Resize(std::size_t new_size);
+  /** @brief Resize and initialize the data if the new size is larger than the old size. */
+  void Resize(std::size_t new_size, T v);
 
   using value_type = T;  // NOLINT