Rename `subr-native-elisp` to `native-comp-function` (bug#71123)

Rename `subr-native-elisp` to `native-comp-function` (bug#71123)

Now that this type name is displayed in *Help*, it is more
important to use a name that is less weird for the unsuspecting user.

* lisp/emacs-lisp/cl-preloaded.el (cl-functionp): Adjust to new name of
native function's type.
(subr-native-elisp-p): Redefine as an obsolete alias.
(native-comp-function): Rename from `subr-native-elisp`

* src/data.c (Fcl_type_of): Return `Qnative_comp_function` i.s.o
`Qsubr_native_elisp`.
(Fnative_comp_function_p): Rename from `Fsubr_native_elisp_p`.
(syms_of_data): Adjust accordingly.

* src/doc.c (Fsubr_documentation): Use new `Fnative_comp_function_p` name.