[xla:runtime] Add custom call UserData benchmark
[xla:runtime] Add custom call UserData benchmark

Adding explicit type ids is ~30% faster (18ns vs 25ns).

BM_UserDataX12None       18.5 ns         18.5 ns     37785041
vs
BM_UserDataX12None       25.1 ns         25.1 ns     28114681

PiperOrigin-RevId: 488255697

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