patch 9.0.1758: vim9 no class identifiers in stack dumps

Problem:  vim9 no class identifiers in stack dumps
Solution: Prefix class members in stack traces with the class name
          followed by a dot.

closes: #12866
closes: #12078

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: LemonBoy <thatlemon@gmail.com>

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1758,
 /**/
     1757,
 /**/