Add and backfill project_id for ci_trigger_requests

.rubocop_todo/rspec/feature_category.yml

app/models/ci/trigger_request.rb

app/services/ci/pipeline_trigger_service.rb

...nd_migrations/backfill_ci_trigger_requests_project_id.yml

db/docs/ci_trigger_requests.yml

...e/20241015074116_add_project_id_to_ci_trigger_requests.rb

...0241015074122_add_index_ci_trigger_requests_project_id.rb

...15074127_queue_backfill_ci_trigger_requests_project_id.rb

db/schema_migrations/20241015074116

db/schema_migrations/20241015074122

db/schema_migrations/20241015074127

db/structure.sql

...ound_migration/backfill_ci_trigger_requests_project_id.rb

spec/controllers/projects/jobs_controller_spec.rb

spec/db/schema_spec.rb

spec/factories/ci/builds.rb

spec/factories/ci/trigger_requests.rb

spec/features/projects/jobs_spec.rb

...migration/backfill_ci_trigger_requests_project_id_spec.rb

...127_queue_backfill_ci_trigger_requests_project_id_spec.rb