nadvice: Fix bug#61179

nadvice: Fix bug#61179

Advising interactive forms relies on the ability to distinguish
interactive forms that do nothing else than return a function.
So, be careful to preserve this info.
Furthermore, interactive forms are expected to be evaluated in
the lexical context captured by the closure to which they belong,
so be careful to preserve that context when manipulating those forms.

* lisp/emacs-lisp/cconv.el (cconv-convert, cconv-analyze-form) <lambda>:
Preserve the info that an interactive form does nothing else than
return a function.

* lisp/emacs-lisp/nadvice.el (advice--interactive-form-1): New function.
(advice--interactive-form): Use it.
(advice--make-interactive-form): Refine to also accept function values
quoted with `quote`.  Remove obsolete TODO.

* test/lisp/emacs-lisp/nadvice-tests.el: Don't disallow byte-compilation.
(advice-test-bug61179): New test.

* lisp/emacs-lisp/oclosure.el (cconv--interactive-helper): Allow
the `if` arg to be a form.
* lisp/simple.el (oclosure-interactive-form): Adjust accordingly.