patch 8.2.2710: Vim9: not all tests cover script and :def function

Problem:    Vim9: not all tests cover script and :def function.
Solution:   Run tests in both if possible. Fix differences.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2710,
 /**/
     2709,
 /**/