I was never able to reproduce this flaky failure locally.

Context
-------------------

When I look through the code, it looks
like this spec is relying on two assumptions:

1. the `gids` of the `FactoryBot` created projects are created in the
   same sequential order they are defined in the code
2. `Project.all` will always return these projects in the same order

I think those two assumptions are possibly the root cause.

In the [`Namespace::ProjectsFinder`][0] we end up calling
`sort_by_attribute(:similarity)`

This eventually falls through to the [sortable concern][1]. As
`:similarity` isn't a column or globally defined search, it falls back
to the `all` scope.

Because of this default, the resulting query has no explicit `ORDER
BY` clause, which conflicts with the specs assumption of some sort of
order

[0]:https://gitlab.com/gitlab-org/gitlab/-/blob/e9ff48e4/app/finders/namespaces/projects_finder.rb#L88
[1]:https://gitlab.com/gitlab-org/gitlab/-/blob/e9ff48e4/app/models/concerns/sortable.rb#L25

Related to https://gitlab.com/gitlab-org/gitlab/-/issues/446251
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/157618