refactor(ci): use templates

.gitlab-ci.yml

 ---
 image: python:latest
 
-include: "templates/no-duplicate-pipelines.yml"
+include:
+  - "templates/no-duplicated-ci-pipelines.yml"
+  - "templates/lint/yamllint.yml"
 
 stages:
   - lint
-
-yamllint:
-  stage: lint
-  rules:
-    - changes:
-        - "**/*.yaml"
-        - "*.yaml"
-        - "**/*.yml"
-        - "*.yml"
-  script:
-    - pip install tox
-    - tox -e yamllint