Update fixtures for seeding PG for multi-version upgrade tests

What does this MR do and why?

Update fixtures for seeding PG for multi-version upgrade tests:

• Removing build_super_group_labels and build_subgroups and relevant code as seeding on groups, projects, milestones, labels is happening as part of db/fixture seeding with SeedFu (gitlab-org/quality/pg-dump-generator!19 (merged))
• Update Gitlab::Seeder::Projects to check if projects were already seeded to resolve issues like https://gitlab.com/gitlab-org/gitlab/-/jobs/6376375244#L818
• Update 03_project_1_user_projects and 03_project_2_group_projects to include Gitlab::Seeder::Projects so that fixtures can be run with FILTER

Context: Data Seeder and fixtures from db are used to seed PG for using in multi-version upgrade testing - gitlab-org/quality/quality-engineering&19 (closed) / https://gitlab.com/gitlab-org/quality/pg-dump-generator#overview

Relevant issue

gitlab-org/quality/quality-engineering/team-tasks#2354 (comment 1801955021) and gitlab-org/quality/quality-engineering/team-tasks#2513 (closed)

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

How to set up and validate locally

1. Run 02_users in GDK to seed users:

   CI=1 MASS_INSERT=1 FILTER=02_users.rb bundle exec rake db:seed_fu

2. Run 03_project_1_user_projects on its own in GDK:

   FILTER=03_project_1_user_projects.rb bundle exec rake db:seed_fu

3. Ensure that there are no errors NameError: uninitialized constant Gitlab::Seeder::Projects as it was in https://gitlab.com/gitlab-org/quality/pg-dump-generator/-/jobs/6335016752#L1404
4. Run 03_project multiple times:

   FILTER=03_project.rb bundle exec rake db:seed_fu

5. Ensure that there are no errors NoMethodError: undefined method '_run_after_commit_queue' for nil:NilClass
6. In GDK run the command to seed the data:

   GITLAB_LOG_LEVEL=debug bundle exec rake "ee:gitlab:seed:data_seeder[bulk_data.rb]"

Testing ✅

• Verified that with these changes DB seeding with Data Seeder is working as expected - https://gitlab.com/gitlab-org/quality/pg-dump-generator/-/jobs/6335016752#L1836
• Verified that 03_project_ fixtures are working as expected when ran in isolation:

output

FILTER=03_project.rb   bundle exec rake db:seed_fu

== Filtering seed files against regexp: /03_project.rb/

== Seed from gitlab-development-kit/gitlab/db/fixtures/development/03_project.rb

Project toolbox/gitlab-smoke-tests already exists, skipping
Project gitlab-org/gitlab-test already exists, skipping
Project gitlab-org/gitlab-shell already exists, skipping
Project gnuwget/Wget2 already exists, skipping
Project Commit451/lab-coat already exists, skipping
Project i-user-2-1710450342/Underscore already exists, skipping
Project flightjs/Flight already exists, skipping
Project twitter/Typeahead.Js already exists, skipping

OK

CI=1  MASS_INSERT=1 FILTER=02_users.rb bundle exec rake db:seed_fu

== Filtering seed files against regexp: /02_users.rb/

== Seed from /gitlab-development-kit/gitlab/db/fixtures/development/02_users.rb

Creating 10 Users.
Rough estimated time: less than a minute ⏰

10 Users created!

Creating 98 user namespaces.
Rough estimated time: less than a minute ⏰

98 user namespaces created!

Creating 98 User namespaces routes.
Rough estimated time: less than a minute ⏰

98 User namespaces routes created!
===========================================================
INFO: Password for newly created users is: ffa6ad4bc29f72f4
===========================================================

Creating 1 root namespaces and subgroups 9 levels deep.
Rough estimated time: less than a minute ⏰
2024-03-15 11:52:04 UTC: Creating subgroups at level 1: 2
2024-03-15 11:52:04 UTC: Creating subgroups at level 2: 6
2024-03-15 11:52:04 UTC: Creating subgroups at level 3: 14
2024-03-15 11:52:04 UTC: Creating subgroups at level 4: 30
2024-03-15 11:52:04 UTC: Creating subgroups at level 5: 62
2024-03-15 11:52:04 UTC: Creating subgroups at level 6: 126
2024-03-15 11:52:04 UTC: Creating subgroups at level 7: 254
2024-03-15 11:52:04 UTC: Creating subgroups at level 8: 510
2024-03-15 11:52:04 UTC: Creating subgroups at level 9: 1022
2024-03-15 11:52:04 UTC: creating routes.
2024-03-15 11:52:04 UTC: filling traversal ids.
2024-03-15 11:52:04 UTC: creating namespace settings.

1 root namespaces and subgroups 9 levels deep created!
....................
OK

 MASS_INSERT=1 CI=1 FILTER=03_project_1_user_projects.rb bundle exec rake db:seed_fu

== Filtering seed files against regexp: /03_project_1_user_projects.rb/

== Seed from /gitlab-development-kit/gitlab/db/fixtures/development/03_project_1_user_projects.rb

Project toolbox/gitlab-smoke-tests already exists, skipping
Project gitlab-org/gitlab-test already exists, skipping
Project gitlab-org/gitlab-shell already exists, skipping
Project gnuwget/Wget2 already exists, skipping
Project Commit451/lab-coat already exists, skipping
Project i-user-2-1710450342/Underscore already exists, skipping
Project flightjs/Flight already exists, skipping
Project twitter/Typeahead.Js already exists, skipping

OK

Creating 50 User projects and corresponding project namespaces.
Rough estimated time: less than a minute ⏰
2024-03-15 11:58:40 UTC: Creating project namespaces: 50.
2024-03-15 11:58:40 UTC: Creating projects: 50.

50 User projects and corresponding project namespaces created!

OK