Workaround PGQuery.parse segfault again

What does this MR do and why?

This was causing segfault problems again #342857 (closed) . We have taken the same approach that was taken in https://gitlab.com/gitlab-org/gitlab/-/blob/3b3dce4acc82e58fef7d2eccc80236061348c5a4/spec/support/database/prevent_cross_joins.rb#L39

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Closes #342857 (closed)