[Quasar] Add SILU SFPU function

[rtawfik01]

Metal team has provided the ops used in Llama: tenstorrent/tt-metal#37122 to bring up on Quasar, and one of them is SILU sfpu function.

Need to add SILU activation function into Quasar to enable Llama

@nvelickovicTT @fvranicTT fyi