Added GlobalDataInterface

[hgangwar]

This PR introduces redev::AdiosGlobalComm to provide a global communication interface between the coupler and the applications using the existing ADIOS channel.
Usage:

auto GDI = app->Add_GDI<pcms::GO>("global_comm", comm);

This creates a global communicator that can send and receive data, for example:

app->BeginSendPhase();
GDI->Send(mean.data(), "mean", mean.size());
app->EndSendPhase();

app->BeginReceivePhase();
mean = GDI->Receive("mean", mean.size());
app->EndReceivePhase();

• The test_GDI test case verifies global communication and data transfer.
• CMake fix to ensure the header file is installed in the expected include directory.

[jacobmerson]

@hgangwar and I discussed offline. The plan for this is to replace the GDI name with Data.

So, we will have something on the order of as follows:

app->AddData("mydata", ...);
app->BeginSendPhase();
app->SendData("mydata");
app->EndSendPhase();

app->BeginReceivePhase();
app->ReceiveData("mydata");
app->EndReceivePhase();