[MLIR][Linalg] More Linalg named ops (#90236)

Adding `min` that was already implemented but not exposed.

Adding a few additional unary ops:
* Reciprocal as `arith.div(1,arg)`
* Round as `math.round(arg)`
* Sqrt as `math.sqrt(arg)`
* Rsqrt as `math.rsqrt(arg)`
* Square as `math.powf(arg, 2)`
* TanH as `math.tanh(arg)`

All with the agreed semantics at the round table: no implicit
broadcast/type cast.