Remove use of `set-output` in GitHub Actions

[rmtolmach]

Description

set-output is set to deprecate May 31, 2023. This message is being seen in the workflows that use it:

The set-output command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

That github link ^^ explains the fix.

Background/context

set-output is used widely across the org.

Technical notes

See PRs linked to this issue for examples.

---

Tasks

• [x] content-build/script/github-actions/check-broken-links-blocks.js
• [x] content-build/script/github-actions/check-broken-links.js
• [x] devops/scripts/pst-access-management/check_roster.rb
• [x] va.gov-team/.github/workflows/application-onboarding-or-promotion-automation.yml
• [x] va.gov-team/.github/workflows/ops-application-onboarding-or-promotion-form.yml
• [x] vsp-infra-argocd-events/.github/workflows/mirror-images.yaml
• [x] vsp-infra-argocd-events/.github/workflows/update-manifests.yaml
• [x] vsp-infra-argocd/.github/workflows/application-onboarding-helm-template.yaml
• [x] vsp-infra-argocd/.github/workflows/capture-onboarding-or-promotion-task.yaml
• [x] vsp-infra-argocd/.github/workflows/mirror-images.yaml
• [x] vsp-infra-argo-notifications-controller/.github/workflows/mirror-images.yaml
• [x] vsp-infra-argo-rollouts/.github/workflows/mirror-images.yaml
• [x] vsp-infra-argo-workflows-server/.github/workflows/mirror-images.yaml
• [x] vsp-infra-aws-node-termination-handler/.github/workflows/mirror-images.yaml
• [x] vsp-infra-aws-node-termination-handler/.github/workflows/update-manifests.yaml
• [x] vsp-infra-calico/.github/workflows/mirror-images.yaml
• [x] vsp-infra-calico/.github/workflows/update-manifests.yaml
• [x] vsp-infra-goldilocks/.github/workflows/mirror-images.yaml
• [x] vsp-infra-goldilocks/.github/workflows/update-manifests.yaml
• [x] vsp-infra-helm/.github/workflows/mirror-images.yml
• [x] vsp-infra-k8s-datadog-agent/.github/workflows/mirror-images.yaml
• [x] vsp-infra-k8s-datadog-agent/.github/workflows/update-manifests.yaml
• [x] vsp-infra-k8s-datadog-private-location/.github/workflows/mirror-images.yaml
• [x] vsp-infra-k8s-datadog-private-location/.github/workflows/update-manifests.yaml
• [x] vsp-infra-k8s-external-dns/.github/workflows/mirror-images.yaml
• [x] vsp-infra-k8s-external-dns/.github/workflows/update-manifests.yaml
• [x] vsp-infra-keda/.github/workflows/mirror-images.yaml
• [x] vsp-infra-kubernetes-autoscaler/.github/workflows/mirror-images.yaml
• [x] vsp-infra-kubernetes-autoscaler/.github/workflows/update-manifests.yaml
• [x] vsp-infra-loki-canary/.github/workflows/ci.yml
• [x] vsp-infra-loki-canary/.github/workflows/mirror-images.yaml
• [x] vsp-infra-traefik/.github/workflows/ci-cd.yaml
• [x] vsp-infra-traefik/.github/workflows/mirror-images.yaml
• [x] vsp-infra-kubernetes-metrics-server/.github/workflows/mirror-images.yaml
• [x] vsp-infra-kubernetes-metrics-server/.github/workflows/update-manifests.yaml

Acceptance Criteria

• [x] All tasks are checked off and linked to this issue.

[hgbarreto]

The following seem to have already been addressed by this PR content-build/script/github-actions/check-broken-links-blocks.js content-build/script/github-actions/check-broken-links.js

[rmtolmach]

Nice work Kyle and Hector (and me lol). Closing!