Try and avoid hardcoding lists of function types

Try and avoid hardcoding lists of function types

* lisp/bind-key.el (bind-key--get-binding-description):
Show docstrings for compiled functions also.  Don't hardcode knowledge
about various particular kinds of functions.

* lisp/emacs-lisp/bytecomp.el (display-call-tree): Remove special
support for functions with a `byte-code` body since we never generate
that nowadays.  Don't hardcode knowledge
about various particular kinds of functions.

(cherry picked from commit 4afafa03704aab0c21e4cb4f028256ecead5f795)