fix(cmdline): avoid redraw loop after wrapped line #40240

Problem:  A wrapped command line and screen width may be redrawn
          repeatedly after calls to `redrawstatus` from lua.

Solution: redrawcmd() redraws the command line, but msg_clr_eos() may
          invalidate cmdline_was_last_drawn during the redraw process.
          Restore cmdline_was_last_drawn when redrawcmd() completes.

Co-authored-by: Sam Reynoso <sam@codeoutpost.com>
Co-authored-by: Luuk van Baal <luukvbaal@gmail.com>
(cherry picked from commit 6be9459d35)

src/nvim/ex_getln.c

@@ -4069,7 +4069,7 @@ void redrawcmd(void)
   // Typing ':' at the more prompt may set skip_redraw.  We don't want this
   // in cmdline mode.
   skip_redraw = false;
-
+  cmdline_was_last_drawn = true;
   redrawing_cmdline = false;
 }