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.

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3311,
 /**/
     3310,
 /**/