Fix failing duo_workflow specs by using new uuid_v7 from gitlab utils

What does this MR do and why?

Fix failing duo_workflow specs by using new uuid_v7 from gitlab utils

References

• Related to #560512 (closed) Previously noticed ruby 3.2 lacked uuid_v7
• We have ported uuid_v7 from ruby 3.3 to gitlab utils Add uuidv7 support for to Gitlab::Utils gem (!203358 - merged)

How to check locally

The flakiness is hard to reproduce because most GDKers use ruby 3.3.x

in gdk/gitlab folder

git checkout master
ruby -v 
# for ruby 3.3  this does not fail
bin/rspec -fd ee/spec/tasks/gitlab/duo_workflow/duo_workflow_spec.rb

# now use a ruby 3.2.x by bundle installing
mise list ruby
mise exec ruby@3.2.8 -- bundle install

# now this shows errors
mise exec ruby@3.2.8 -- bin/rspec -fd ee/spec/tasks/gitlab/duo_workflow/duo_workflow_spec.rb

Now do the same in the current MR's branch and all is fine.

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