TTIR Select op should be renamed

[mrakitaTT]

We currently have TTIR_SelectOp which was added to match the Forge Select op. We should choose a different name for this op in TTIR, because in all other dialects Select is used interchangeably for the same op as the Where op (which we also have in TTIR), so it is very confusing that we have both Select and Where and they are different ops.

Note that this change will break the Forge FE, so it should be done in phases if we care about not temporarily breaking the Forge FE (add renamed op in TTIR, change the Forge FE, delete Select op from TTIR).