Remove CircelCI (#871)

Follow-up of #861 and hashicorp/gha-migration#158

.circleci/config.yml

@@ -1,71 +0,0 @@
-# Copyright (c) HashiCorp, Inc.
-# SPDX-License-Identifier: MPL-2.0
-
-version: 2.1
-orbs:
-  slack: circleci/slack@3.4.2
-
-jobs:
-  update-helm-charts-index:
-    docker:
-      - image: docker.mirror.hashicorp.services/cimg/go:1.19.2
-    steps:
-      - checkout
-      - run:
-          name: verify Chart version matches tag version
-          environment:
-            RELEASE_TAG: << pipeline.parameters.release-tag >>
-          command: |
-            go install github.com/mikefarah/yq/v2@latest
-            export TAG=${RELEASE_TAG:-$CIRCLE_TAG}
-            git_tag=$(echo "${TAG#v}")
-            chart_tag=$(yq r Chart.yaml version)
-            if [ "${git_tag}" != "${chart_tag}" ]; then
-              echo "chart version (${chart_tag}) did not match git version (${git_tag})"
-              exit 1
-            fi
-      - run:
-          name: install gh tool
-          command: |
-            version="2.22.1"
-            curl --show-error --silent --location --output "gh.tar.gz" "https://github.com/cli/cli/releases/download/v${version}/gh_${version}_linux_amd64.tar.gz"
-            tar -xvzf gh.tar.gz && mkdir -p bin && mv "gh_${version}_linux_amd64/bin/gh" bin/
-
-      - run:
-          name: update helm-charts index
-          environment:
-            RELEASE_TAG: << pipeline.parameters.release-tag >>
-          command: |
-            export GITHUB_TOKEN="${HELM_CHARTS_GITHUB_TOKEN}"
-            ./bin/gh workflow run publish-charts.yml \
-              --repo hashicorp/helm-charts \
-              --ref main \
-              -f SOURCE_TAG="${CIRCLE_TAG}" \
-              -f SOURCE_REPO="${CIRCLE_PROJECT_USERNAME}/${CIRCLE_PROJECT_REPONAME}"
-      - slack/status:
-          fail_only: true
-          failure_message: "Failed to trigger an update to the helm charts index. Check the logs at: ${CIRCLE_BUILD_URL}"
-
-parameters:
-  release-tag:
-    type: string
-    default: ""
-    description: "The tag to release, including v, e.g. v0.22.1"
-
-workflows:
-  version: 2
-  # Note: unit and acceptance tests are now being run in GitHub Actions
-  update-helm-charts-index:
-    jobs:
-      - update-helm-charts-index:
-          context: helm-charts-trigger-vault
-          filters:
-            tags:
-              only: /^v.*/
-            branches:
-              ignore: /.*/
-  manual-trigger-update-helm-charts-index:
-    when: << pipeline.parameters.release-tag >>
-    jobs:
-      - update-helm-charts-index:
-          context: helm-charts-trigger-vault