Update(DeviceProxy): Dynamically Determine Memory Allocation Size & Remove Compile-Time size Calculations (#48)

* Update(DeviceProxy): Dynamically Determine Memory Allocation Size & Remove Compile-Time size Calculations

- Modified the Device proxy class to determine memory allocation size at runtime.
- Updated all classes that include the Device proxy to use dynamic memory allocation.
- Removed compile-time memory size calculations.
- Ensured the allocated number of backend queue data structures matches the number of RO device contexts.

src/hdp_proxy.hpp

@@ -36,10 +36,18 @@ class HdpProxy {
   /*
    * Placement new the memory which is allocated by proxy_
    */
-  HdpProxy() {
+  HdpProxy(size_t num_elems = 1) : proxy_{num_elems} {
     new (proxy_.get()) HdpPolicy();
   }
 
+  HdpProxy(const HdpProxy& other) = delete;
+
+  HdpProxy& operator=(const HdpProxy& other) = delete;
+
+  HdpProxy(HdpProxy&& other) = default;
+
+  HdpProxy& operator=(HdpProxy&& other) = default;
+
   /*
    * Since placement new is called in the constructor, then
    * delete must be called manually.