patch 8.2.3967: error messages are spread out

Problem:    Error messages are spread out.
Solution:   Move more errors to errors.h.
diff --git a/src/vim9instr.c b/src/vim9instr.c
index 0483068..49936c3 100644
--- a/src/vim9instr.c
+++ b/src/vim9instr.c
@@ -757,7 +757,7 @@
     if (type->tt_type != VAR_LIST)
     {
 	// cannot happen, caller has checked the type
-	emsg(_(e_listreq));
+	emsg(_(e_list_required));
 	return FAIL;
     }
     item_type = type->tt_member;