Mark all def* functions that should indent as `defun'

* lisp/abbrev.el (define-abbrev):
(define-abbrev-table): Mark all functions that have names that
start with "def" that should indent according to the current
heuristics (bug#43329).
* lisp/autoinsert.el (define-auto-insert):

* lisp/button.el (define-button-type):

* lisp/subr.el (define-key-after):
(define-mail-user-agent):
(define-keymap):

* lisp/widget.el (define-widget):

* lisp/emacs-lisp/package.el (define-package):

* lisp/international/mule-cmds.el (define-char-code-property):

* lisp/international/mule.el (define-charset):
(define-coding-system):
(define-translation-table):
(define-translation-hash-table):

lisp/widget.el

@@ -83,7 +83,7 @@ create identical widgets:
 * (apply #\\='widget-create CLASS ARGS)
 
 The third argument DOC is a documentation string for the widget."
-  (declare (doc-string 3))
+  (declare (doc-string 3) (indent defun))
   ;;
   (unless (or (null doc) (stringp doc))
     (error "Widget documentation must be nil or a string"))