patch 8.2.1740: test fails without the terminal feature

Problem:    Test fails without the terminal feature.
Solution:   Skip test if the terminal feature is not available.
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 4a4047f..dee4503 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -2832,6 +2832,8 @@
 enddef
 
 def Test_define_func_at_command_line()
+  CheckRunVimInTerminal
+
   # run in a separate Vim instance to avoid the script context
   let lines =<< trim END
     func CheckAndQuit()