patch 8.2.2361: Vim9: no highlight for "s///gc" when using 'opfunc'

Problem:    Vim9: no highlight for "s///gc" when using 'opfunc'.
Solution:   Reset 'lazyredraw' temporarily. (closes #7687)
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index a3226d2..545e06d 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -4158,6 +4158,7 @@
 			{
 			    char_u *orig_line = NULL;
 			    int    len_change = 0;
+			    int	   save_p_lz = p_lz;
 #ifdef FEAT_FOLDING
 			    int save_p_fen = curwin->w_p_fen;
 
@@ -4168,6 +4169,9 @@
 			    temp = RedrawingDisabled;
 			    RedrawingDisabled = 0;
 
+			    // avoid calling update_screen() in vgetorpeek()
+			    p_lz = FALSE;
+
 			    if (new_start != NULL)
 			    {
 				// There already was a substitution, we would
@@ -4243,6 +4247,7 @@
 			    msg_didout = FALSE;	// don't scroll up
 			    msg_col = 0;
 			    gotocmdline(TRUE);
+			    p_lz = save_p_lz;
 
 			    // restore the line
 			    if (orig_line != NULL)