patch 8.2.3311: Vim9: check for DO_NOT_FREE_CNT is very slow

Problem:    Vim9: check for DO_NOT_FREE_CNT is very slow.
Solution:   Move to a separate function so it can be skipped by setting
            $TEST_SKIP_PAT.
diff --git a/src/version.c b/src/version.c
index 9c374b1..d31a019 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3311,
+/**/
     3310,
 /**/
     3309,