Expanded defcustom type byte-compilation warnings (bug#65852)

Expanded defcustom type byte-compilation warnings (bug#65852)

Warn about more kinds of mistakes in :type arguments of `defcustom`
and `define-widget`.  These include:

- misplaced keyword args, as in (const red :tag "A reddish hue")
- missing subordinate types, as in (repeat :tag "List of names")
  or (choice list string)
- duplicated values, as in (choice (const yes) (const yes))
- misplaced `other` member, as in
  (choice (const red) (other nil) (const blue))
- various type name mistakes, as in (vector bool functionp)

* lisp/emacs-lisp/bytecomp.el (byte-compile--defcustom-type-quoted)
(byte-compile-nogroup-warn): Remove.
(byte-compile-normal-call): Remove call to the above.
(bytecomp--cus-warn, bytecomp--check-cus-type)
(bytecomp--custom-declare): New.