Log process group name instead of pg uid

Summary:
X-link: pytorch/pytorch#124035

As part of the work of unifying process group identifier, log <group_name, group_desc>,  instead of pg uid in profiler.
- group_name remains as the unique identifier, e.g. “0”, "1"
- group_desc will be the user specified name, e.g. "fsdp".

Reviewed By: aaronenyeshi, kwen2501

Differential Revision: D55610682

fbshipit-source-id: 01c9ad38a7ac06f4c40156ae6e9e20cdda989ca7

src/torch_ucc_tracing.cpp

@@ -169,7 +169,7 @@ void CommTraceLogger::recordComms(
   // record the trace to kineto trace if applicable
   RECORD_PARAM_COMMS(
       static_cast<int64_t>(seqnum), // seq
-      0, // process group ptr
+      std::make_tuple("0", ""), // pg_name tuple
       rank,
       commName.c_str(),
       inSize,