Fix infinite looping in 'next-frame' and associates (Bug#77985)
* src/frame.c (next_frame): Rewrite to avoid infinite looping if
FRAME itself does not qualify as candidate frame (Bug#77985).
(Fnext_frame, Fprevious_frame): Adjust do-strings.
* lisp/frame.el (other-frame): Adjust doc-string.
(frame-list-1): New function.
(make-frame-names-alist): Rewrite using 'frame-list-1' instead
of 'next-frame' (Bug#77985).
(delete-other-frames): Rewrite using 'frame-list' instead of
'next-frame'.
* doc/lispref/frames.texi (Finding All Frames): Minor
clarifications for 'frame-list' and 'next-frame'.
(cherry picked from commit
004187350238a05a5c7f818c9feb648c792fe9db)