patch 9.0.1032: test fails when terminal feature is missing

Problem:    Test fails when terminal feature is missing.
Solution:   Use CheckRunVimInTerminal.
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index 28f845a..78f9ba2 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -2486,6 +2486,8 @@
 endfunc
 
 func Test_wildmenu_pum_clear_entries()
+  CheckRunVimInTerminal
+
   " This was using freed memory.  Run in a terminal to get the pum to update.
   let lines =<< trim END
     set wildoptions=pum