Rename generate-file to generate-lisp-file

Rename generate-file to generate-lisp-file

* lisp/url/url-cookie.el (url-cookie-write-file):
* lisp/international/titdic-cnv.el (tit-process-header)
(miscdic-convert):
* lisp/international/ja-dic-cnv.el (skkdic-convert):
* lisp/international/emoji.el (emoji--generate-file):
* lisp/emacs-lisp/loaddefs-gen.el (loaddefs-generate--rubric):
* admin/unidata/unidata-gen.el (unidata-gen-file)
(unidata-gen-charprop): Adjust callers.

* lisp/emacs-lisp/generate-lisp-file.el: Renamed from
generate-file.el.  Also rename some keyword parameters and require
a generator function.