Add symbol_guard_limit_before_specialize (#119347)
Add a flag setting that controls a threshold of guards involving a symbol, after which we force a symbol to be specialized. The roll out plan is to enable this on OSS but not fbcode, and then roll out to fbcode after we get some telemetry from the previous PR.
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/119347
Approved by: https://github.com/lezcano
