Dump outer variables tables when dumping an iseq to binary

	This commit dumps the outer variables table when dumping an iseq to
	binary.  This fixes a case where Ractors aren't able to tell what outer
	variables belong to a lambda after the lambda is loaded via ISeq.load_from_binary

	[Bug #18232] [ruby-core:105504]
	---
	 compile.c              | 55 +++++++++++++++++++++++++++++++++++++++++++++++++-
	 test/ruby/test_iseq.rb | 10 +++++++++
	 2 files changed, 64 insertions(+), 1 deletion(-)