fix: invoke changed_bytes when rewriting <Tab> char #25125

When tabstop and shiftwidth are not equal, tabs are inserted as individual
spaces and then rewritten as tab characters in a second pass. That second pass
did not call changed_bytes which resulted in events being omitted.

Fixes #25092

src/nvim/edit.c

@@ -4429,9 +4429,8 @@ static bool ins_tab(void)
           }
         }
         if (!(State & VREPLACE_FLAG)) {
-          extmark_splice_cols(curbuf, (int)fpos.lnum - 1, change_col,
-                              cursor->col - change_col, fpos.col - change_col,
-                              kExtmarkUndo);
+          inserted_bytes(fpos.lnum, change_col,
+                         cursor->col - change_col, fpos.col - change_col);
         }
       }
       cursor->col -= i;