[Heartbeat][CI] there is no heartbeat stages in the main pipeline

### What

Heartbeat is not tested in the CI


### Actions

* [x] Provide the mage/make goals that are need to be included in the CI (build, test, integration testing, crosscompile....)
* [x] Uncomment https://github.com/elastic/beats/blob/master/Jenkinsfile.yml#L22
* [x] Create Jenkinsfile.yml in the heartbeat folder