Other jobs, e.g. renovate-bot and semantic-release, use job-specific CI
variables. Transition to a job-specific variable name for goreleaser, too.

The `GITLAB_TOKEN` variable is still supported but will yield a deprecation
warning. This is identical to the semantic-release job.

feat(goreleaser): add support for the `GORELEASER_GITLAB_TOKEN` CI variable.

See merge request !949

## [2.64.0](https://gitlab.com/gitlab-com/gl-infra/common-ci-tasks/-/compare/...) (2025-03-17)

### Features

* **goreleaser:** add support for the `GORELEASER_GITLAB_TOKEN` CI variable. ([3fc882ba](3fc882ba))