perf: optimize factorial function performance

[getChan]

Which issue does this PR close?

• Closes #.

Rationale for this change

benchmark

factorial_array         time:   [778.63 ns 783.03 ns 787.52 ns]
                        change: [−90.314% −90.211% −90.055%] (p = 0.00 < 0.05)
                        Performance has improved.

factorial_scalar        time:   [317.32 ns 319.36 ns 321.41 ns]
                        change: [−28.219% −27.508% −26.683%] (p = 0.00 < 0.05)
                        Performance has improved.

What changes are included in this PR?

1. factorial implementation from using loop to looking up precomputed values.
2. using the try_unary kernel function on PrimitiveArray. (However, since this isn’t unary function, it does not get vectorized execution)

and add benchmark

Are these changes tested?

Yes.

Are there any user-facing changes?

No.