Remove default timeout from PGNCCL::Options ctor (#112555)

Providing this timeout to the Options ctor is overriding user-provided
values in cases where is_high_priority_stream is set.
Pull Request resolved: #112555
Approved by: https://github.com/fduwjj, https://github.com/H-Huang

torch/csrc/distributed/c10d/ProcessGroupNCCL.cpp

@@ -1898,7 +1898,7 @@ void ProcessGroupNCCL::workEnqueue(
 }
 
 ProcessGroupNCCL::Options::Options(bool is_high_priority_stream)
-    : Backend::Options(NCCL_BACKEND_NAME, kProcessGroupNCCLDefaultTimeout),
+    : Backend::Options(NCCL_BACKEND_NAME),
       is_high_priority_stream(is_high_priority_stream) {}
 
 static constexpr int CoalActive = 0x01, CoalColl = 0x02, CoalP2P = 0x04;