Remove the goreleaser job definition and its associated rules and
variables from .gitlab-ci.yml. The upstream rules now expanded and cover
alredy our case.

See 
https://gitlab.com/gitlab-com/gl-infra/common-ci-tasks/-/blob/a8cddfec660f68b16ecde0c80319a57d7c645f56/goreleaser.yml#L301-L303

fix(ci): remove goreleaser job customization

See merge request !375