xla

b969cba3 - [LTC] Replace XLA_FN_COUNTER with TORCH_LAZY_FN_COUNTER (#4217)

[LTC] Replace XLA_FN_COUNTER with TORCH_LAZY_FN_COUNTER (#4217) Summary: TORCH_LAZY_FN_COUNTER supports prefix op names with any string. Therefore, we can just reuse it to add xla prefix to xla ops. Test Plan: CI.