Add CI/CD pipeline to kf-dag-portal-etl

[botekchristophe]

the pipeline should include

• [x] Pylint
• [x] Copying the dags folder to s3://kf-strides-232196027141-service-dag-bucket/dags
• [x] Copying the requirements.txt file to s3://kf-strides-232196027141-service-dag-bucket/requirements.txt

[celinepelletier]

CI (aka pylint) -> Circle-ci CD (aka aws cp) -> Jenkins

[celinepelletier]

CI : https://app.circleci.com/pipelines/github/kids-first/kf-dag-portal-etl

CD : https://aws-infra-jenkins-service.kf-strides.org/job/kids-first-kf-dag-portal-etl/ Apply only for master branch (do nothing for others)

Upload requirements.txt in S3

Upload dags/** in S3