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/ipc/backend_ipc.cpp

@@ -221,7 +221,7 @@ void IPCBackend::create_new_team([[maybe_unused]] Team *parent_team,
 
   /**
    * Allocate device-side memory for team_world and
-   * construct a GPU_IB team in it
+   * construct a IPC team in it
    */
   GPUIBTeam *new_team_obj;
   CHECK_HIP(hipMalloc(&new_team_obj, sizeof(IPCTeam)));

projects/rocshmem/src/ipc/ipc_context_proxy.hpp

@@ -41,8 +41,9 @@ class IPCDefaultContextProxy {
   /*
    * Placement new the memory which is allocated by proxy_
    */
-  explicit IPCDefaultContextProxy(IPCBackend* backend, TeamInfo *tinfo)
-  : constructed_{true} {
+  explicit IPCDefaultContextProxy(IPCBackend* backend, TeamInfo *tinfo,
+                                  size_t num_elems = 1)
+  : constructed_{true}, proxy_{num_elems} {
     auto ctx{proxy_.get()};
     new (ctx) IPCContext(reinterpret_cast<Backend*>(backend));
     ctx->tinfo = tinfo;