Skip project repository disk validation in development project seeder

When seeding the GDK with new projects, it's very common to reuse
the same repository names on disk. Previously, the validation would
fail and leave the projects in a half-broken state. We can skip
the validation to avoid causing odd errors.

Closes gitlab-org/gitlab-development-kit#310

db/fixtures/development/04_project.rb

@@ -63,7 +63,8 @@ Sidekiq::Testing.inline! do
         namespace_id: group.id,
         name: project_path.titleize,
         description: FFaker::Lorem.sentence,
-        visibility_level: Gitlab::VisibilityLevel.values.sample
+        visibility_level: Gitlab::VisibilityLevel.values.sample,
+        skip_disk_validation: true
       }
 
       project = Projects::CreateService.new(User.first, params).execute