vim-patch:9.1.0797: testing of options can be further improved (#30893)

Problem:  testing of options can be further improved
Solution: split the generated option test into test_options_all.vim,
          add more test cases, save and restore values, fix use-after-free

closes: vim/vim#15894

6eca04e9f1

Co-authored-by: Milly <milly.ca@gmail.com>

src/nvim/main.c

@@ -777,7 +777,11 @@ void getout(int exitval)
     }
   }
 
-  if (p_shada && *p_shada != NUL) {
+  if (
+#ifdef EXITFREE
+      !entered_free_all_mem &&
+#endif
+      p_shada && *p_shada != NUL) {
     // Write out the registers, history, marks etc, to the ShaDa file
     shada_write_file(NULL, false);
   }