Configure Sec CI for MR's labelled sec-decomposition

.gitlab-ci.yml

.gitlab/ci/database.gitlab-ci.yml

.gitlab/ci/rails.gitlab-ci.yml

.gitlab/ci/rails/shared.gitlab-ci.yml

.gitlab/ci/rules.gitlab-ci.yml

config/database.yml.decomposed-sec-postgresql

...105945_requeue_backfill_finding_id_in_vulnerabilities3.rb

...ueue2_backfill_has_remediations_of_vulnerability_reads.rb

...21223259_queue_drop_vulnerabilities_without_finding_id.rb

...igrate/20240214204800_drop_invalid_vulnerabilities_gdk.rb

...304_backfill_vulnerability_feedback_pipeline_id_bigint.rb

...queue_fix_corrupted_scanner_ids_of_vulnerability_reads.rb

...fill_archived_and_traversal_ids_to_vulnerability_reads.rb

lib/gitlab/database/query_analyzers/base.rb

scripts/utils.sh

..._backfill_identifier_names_of_vulnerability_reads_spec.rb