Schedule the `namespaces.organization_id` foreign key to be validated

What does this MR do and why?

Schedule the namespaces.organization_id foreign key to be validated

See https://docs.gitlab.com/ee/development/database/add_foreign_key_to_existing_column.html#schedule-the-fk-to-be-validated.

Migration output

up

❯ bin/rails db:migrate
DEPRECATION WARNING: Support for Rails versions < 7.1 is deprecated and will be removed from ViewComponent 4.0.0 (ViewComponent v4 will remove support for Rails versions < 7.1 no earlier than April 1, 2025) (called from <main> at /Users/abdul/gitlab/gdk/gitlab/config/environment.rb:7)
main: == [advisory_lock_connection] object_id: 131540, pg_backend_pid: 78271
main: == 20250114100435 PrepareAsyncValidateForeignKeyForNamespacesOrganizationId: migrating
main: == 20250114100435 PrepareAsyncValidateForeignKeyForNamespacesOrganizationId: migrated (0.0605s)

main: == [advisory_lock_connection] object_id: 131540, pg_backend_pid: 78271
ci: == [advisory_lock_connection] object_id: 131900, pg_backend_pid: 78273
ci: == 20250114100435 PrepareAsyncValidateForeignKeyForNamespacesOrganizationId: migrating
ci: == 20250114100435 PrepareAsyncValidateForeignKeyForNamespacesOrganizationId: migrated (0.0336s)

ci: == [advisory_lock_connection] object_id: 131900, pg_backend_pid: 78273

down

❯ VERSION=20250114100435 bin/rails db:migrate:down:main && VERSION=20250114100435 bin/rails db:migrate:down:ci
DEPRECATION WARNING: Support for Rails versions < 7.1 is deprecated and will be removed from ViewComponent 4.0.0 (ViewComponent v4 will remove support for Rails versions < 7.1 no earlier than April 1, 2025) (called from <main> at /Users/abdul/gitlab/gdk/gitlab/config/environment.rb:7)
main: == [advisory_lock_connection] object_id: 131060, pg_backend_pid: 50972
main: == 20250114100435 PrepareAsyncValidateForeignKeyForNamespacesOrganizationId: reverting
main: == 20250114100435 PrepareAsyncValidateForeignKeyForNamespacesOrganizationId: reverted (0.0401s)

main: == [advisory_lock_connection] object_id: 131060, pg_backend_pid: 50972
DEPRECATION WARNING: Support for Rails versions < 7.1 is deprecated and will be removed from ViewComponent 4.0.0 (ViewComponent v4 will remove support for Rails versions < 7.1 no earlier than April 1, 2025) (called from <main> at /Users/abdul/gitlab/gdk/gitlab/config/environment.rb:7)
ci: == [advisory_lock_connection] object_id: 131060, pg_backend_pid: 54387
ci: == 20250114100435 PrepareAsyncValidateForeignKeyForNamespacesOrganizationId: reverting
ci: == 20250114100435 PrepareAsyncValidateForeignKeyForNamespacesOrganizationId: reverted (0.0885s)

ci: == [advisory_lock_connection] object_id: 131060, pg_backend_pid: 54387

References

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Related to #466142 (closed)