[MLIR][Linalg] Ternary Op & Linalg select (#91461)

Following #90236, adding `select` to linalg as `arith.select`. No
implicit type casting.
OpDSL doesn't expose a type restriction for bool, but I saw no reason in
adding it (put a separate symbolic type and check the semantics in the
builder).

---------

Co-authored-by: Renato Golin <rengolin@systemcall.eu>
Co-authored-by: Maksim Levental <maksim.levental@gmail.com>