[torchelastic] Make sure `rdzv_configs[timeout]` is not getting overwritten (#61471)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61471
Make sure `rdzv_configs[timeout]` is not getting overwritten
Test Plan: sandcastle
Differential Revision: D29638606
fbshipit-source-id: e164cdddaed77e7e35412ed58ac1ee312e9d489d
