patch 8.2.1734: Vim9: cannot use a funcref for a closure twice

Problem:    Vim9: cannot use a funcref for a closure twice.
Solution:   Instead of putting the funcref on the stack use a growarray on the
            execution context.
diff --git a/src/testdir/test_vim9_disassemble.vim b/src/testdir/test_vim9_disassemble.vim
index 7fd8c06..39dd513 100644
--- a/src/testdir/test_vim9_disassemble.vim
+++ b/src/testdir/test_vim9_disassemble.vim
@@ -708,7 +708,7 @@
   let instr = execute('disassemble WithLambda')
   assert_match('WithLambda\_s*' ..
         'let F = {a -> "X" .. a .. "X"}\_s*' ..
-        '\d FUNCREF <lambda>\d\+ $1\_s*' ..
+        '\d FUNCREF <lambda>\d\+\_s*' ..
         '\d STORE $0\_s*' ..
         'return F("x")\_s*' ..
         '\d PUSHS "x"\_s*' ..