Fix flaky spec vulnerability reads finder spec

What does this MR do and why?

Instead of modifiying a project created with let_it_be create a new one.

This MR also makes this spec run in random order.

Closes:

• #454648 (closed)
• #454647 (closed)
• #454646 (closed)
• #454645 (closed)
• #454644 (closed)
• #454643 (closed)
• #454653 (closed)
• #454652 (closed)
• #454651 (closed)
• #454650 (closed)
• #454649 (closed)
• #454654 (closed)

How to set up and validate locally

scripts/rspec_check_order_dependence ee/spec/finders/security/vulnerability_reads_finder_spec.rb

while :; do bin/rspec ee/spec/finders/security/vulnerability_reads_finder_spec.rb || break; done