Skip Edebug workaround for cl-flet in Emacs 28.1.
Skip Edebug workaround for cl-flet in Emacs 28.1.

Emacs 28.1 will fix these issues.  Since the workaround is pretty invasive,
install it only when needed.

phst/rules_elisp,phst/rules_elisp,phst/rules_elisp,phst/rules_elisp,phst/rules_elisp