Delete hstack and hslice patterns in pattern matching logic

[dgolubovicTT]

Delete hstack and hslice patterns in pattern matching logic since they won't be used anymore (Reshape aims to work on tt-metal without the need for decomposition)

[AleksKnezevic]

While metal has reshape and transpose ops, it also has much more performant (and I would imagine more general) split_heads (hslice) and concatonate_heads (hstack) ops. I would not remove these.

[nvukobratTT]

While metal has reshape and transpose ops, it also has much more performant (and I would imagine more general) split_heads (hslice) and concatonate_heads (hstack) ops. I would not remove these.

Valid point, however, I think this is more suitable for fusing on the TTIR level.

Do you see the value of keeping these on frontends as well @AleksKnezevic? My concern is that this isn't standard FE op, and that there aren't many benefits of mapping these on TTIR. Rather, we should handle it during TTIR decomposition/fusing.

Let me know your thoughts :))

[AleksKnezevic]

Yeah, I'm happy with moving these to TTIR level.