Use SIMD backend in normalize-arguments/* if possible

[kchanqvq]

This mostly addresses the issue discussed in digikar99/dense-arrays#7 by avoiding calling asarray in code expecting high performance.

[digikar99]

Instead of (defun convert-argument-type (array-like out-type) ...), I'm leaning towards (defun ensure-array-with-type (array-like type) ...).

But otherwise this looks good!

[digikar99]

Some more suggestions:

1. Make the equivalent changes in src/basic-math/n-arg-fn.lisp
2. Ensure that running make-dense-numericals.sh in project root produces the dense-numericals-src with appropriate code, particularly the above.
3. The commit(s) should be tagged as [perf] ... or [int] ... rather than [add] ... since this is a performance enhancement or an internal change rather than a user-facing feature addition.