Fix prefix store timeout bug (#53928)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53928
HashStoreTest was taking forever to run. Turns out it was because a default timeout is set when creating Store() and setTimeout for prefixStore is not actually able to change the timeout of the underlying store.
After removing the default timeout and updating setTimeout, this will save ~10 minutes for all of the gcc_test CI runs.
Test Plan: Imported from OSS
Reviewed By: mrshenli
Differential Revision: D27025275
Pulled By: H-Huang
fbshipit-source-id: 650c8c1eb8b166da1d412ed88e765747a2ca2069
