patch 8.2.2321: Vim9: cannot nest closures

Problem:    Vim9: cannot nest closures.
Solution:   Add the nesting level to ISN_LOADOUTER and ISN_STOREOUTER.
            (closes #7150, closes #7635)
diff --git a/src/testdir/test_vim9_disassemble.vim b/src/testdir/test_vim9_disassemble.vim
index f25b04a..ca9b90e 100644
--- a/src/testdir/test_vim9_disassemble.vim
+++ b/src/testdir/test_vim9_disassemble.vim
@@ -567,17 +567,17 @@
   var res = execute('disass g:Append')
   assert_match('<lambda>\d\_s*' ..
         'local ..= arg\_s*' ..
-        '\d LOADOUTER $0\_s*' ..
+        '\d LOADOUTER level 1 $0\_s*' ..
         '\d LOAD arg\[-1\]\_s*' ..
         '\d CONCAT\_s*' ..
-        '\d STOREOUTER $0\_s*' ..
+        '\d STOREOUTER level 1 $0\_s*' ..
         '\d RETURN 0',
         res)
 
   res = execute('disass g:Get')
   assert_match('<lambda>\d\_s*' ..
         'return local\_s*' ..
-        '\d LOADOUTER $0\_s*' ..
+        '\d LOADOUTER level 1 $0\_s*' ..
         '\d RETURN',
         res)