patch 8.2.0382: some tests fail when run under valgrind

Problem:    Some tests fail when run under valgrind.
Solution:   Increase timeouts.
diff --git a/src/testdir/test_ins_complete.vim b/src/testdir/test_ins_complete.vim
index 77045f4..3a83577 100644
--- a/src/testdir/test_ins_complete.vim
+++ b/src/testdir/test_ins_complete.vim
@@ -429,7 +429,7 @@
   let buf = RunVimInTerminal('-S Xpreviewscript', #{rows: 12})
   call term_wait(buf, 100)
   call term_sendkeys(buf, "Gi\<C-X>\<C-O>")
-  call term_wait(buf, 100)
+  call term_wait(buf, 200)
   call term_sendkeys(buf, "\<C-N>")
   call VerifyScreenDump(buf, 'Test_pum_with_preview_win', {})