Add automation to update Go versions and packages for all Runner projects
### Description In https://gitlab.com/gitlab-org/gitlab-runner/-/issues/39146#note_2972801678 , we manually updated Go version for various projects owned by the Runner teams. This was a tedious and manual process since a long time had passed since the last version update. To avoid this, we should setup automation(e.g. Renovate) to auto-update the Go versions and go packages in all the Runner projects to ensure we regularly update and release them. <!-- template sourced from https://gitlab.com/gitlab-org/gitlab-runner/-/blob/main/.gitlab/issue_templates/Default.md -->
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