Add parent and child pipelines CI files

.child-ci.yml

+child_job:
+  stage: test
+  tags: ["pipelines-dependent-relationship-9115fb9e07940a85"]
+  needs:
+    - project: gitlab-qa-sandbox-group-6/qa-test-2024-11-01-15-56-54-7ee74f3a569832ca/pipelines-dependent-relationship-9115fb9e07940a85
+      job: job1
+      ref: main
+      artifacts: true
+  script:
+    - cat output.txt
+    - echo "Child job done!"
+

.gitlab-ci.yml

+stages:
+  - build
+  - test
+  - deploy
+
+default:
+  tags: ["pipelines-dependent-relationship-9115fb9e07940a85"]
+
+job1:
+  stage: build
+  script: echo "build success" > output.txt
+  artifacts:
+    paths:
+      - output.txt
+
+job2:
+  stage: test
+  trigger:
+    include: ".child-ci.yml"
+    strategy: depend
+
+job3:
+  stage: deploy
+  script: echo "parent deploy done"
+