[dist_optim] serialize compilation when creating dist_optim (#45871) #46071
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Summary:
Fix distributed optimizer concurrent torchscript compilation with explicit locking. PR already approved and merged on master.
The PR already landed in master, see #45871
This PR fixed #45845
Test Plan: Imported from OSS
Reviewed By: pritamdamania87
Differential Revision: D24125209
Pulled By: wanchaol
fbshipit-source-id: e3697dd6ef107d8153d2a82d78a17c66d109b4fa