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.

[ROCm/rocshmem commit: eb5a38e806]

projects/rocshmem/src/memory/notifier.hpp

@@ -101,10 +101,18 @@ class NotifierProxy {
   using ProxyT = DeviceProxy<ALLOCATOR, Notifier<scope>>;
 
  public:
-  NotifierProxy() {
+  NotifierProxy(size_t num_elems = 1) : proxy_{num_elems} {
     new (proxy_.get()) Notifier<scope>();
   }
 
+  NotifierProxy(const NotifierProxy& other) = delete;
+
+  NotifierProxy& operator=(const NotifierProxy& other) = delete;
+
+  NotifierProxy(NotifierProxy&& other) = default;
+
+  NotifierProxy& operator=(NotifierProxy&& other) = default;
+
   ~NotifierProxy() {
     proxy_.get()->~Notifier<scope>();
   }