Backport of upgrade test: use docker.mirror.hashicorp.services to avoid docker login into release/1.15.x (#17242)

* backport of commit 72decfe4cf

* backport of commit b86c1eb345

---------

Co-authored-by: cskh <hui.kang@hashicorp.com>
Co-authored-by: Dan Bond <danbond@protonmail.com>

.github/workflows/test-integrations.yml

@@ -326,7 +326,7 @@ jobs:
               "${{ matrix.test-cases }}" \
               --target-image ${{ env.CONSUL_LATEST_IMAGE_NAME }} \
               --target-version local \
-              --latest-image ${{ env.CONSUL_LATEST_IMAGE_NAME }} \
+              --latest-image docker.mirror.hashicorp.services/${{ env.CONSUL_LATEST_IMAGE_NAME }} \
               --latest-version latest
             ls -lrt
         env:
@@ -378,9 +378,6 @@ jobs:
   
   upgrade-integration-test:
     runs-on: ${{ fromJSON(needs.setup.outputs.compute-xl) }}
-    permissions:
-      id-token: write # NOTE: this permission is explicitly required for Vault auth.
-      contents: read
     needs:
       - setup
       - dev-build
@@ -399,33 +396,6 @@ jobs:
           go-version-file: 'go.mod'
       - run: go env
 
-      # NOTE: ENT specific step as we store secrets in Vault.
-      - name: Authenticate to Vault
-        if: ${{ endsWith(github.repository, '-enterprise') }}
-        id: vault-auth
-        run: vault-auth
-
-      # NOTE: ENT specific step as we store secrets in Vault.
-      - name: Fetch Secrets
-        if: ${{ endsWith(github.repository, '-enterprise') }}
-        id: secrets
-        uses: hashicorp/vault-action@v2.5.0
-        with:
-          url: ${{ steps.vault-auth.outputs.addr }}
-          caCertificate: ${{ steps.vault-auth.outputs.ca_certificate }}
-          token: ${{ steps.vault-auth.outputs.token }}
-          secrets: |
-              kv/data/github/${{ github.repository }}/dockerhub username | DOCKERHUB_USERNAME;
-              kv/data/github/${{ github.repository }}/dockerhub token | DOCKERHUB_TOKEN;
-
-      # NOTE: conditional specific logic as we store secrets in Vault in ENT and use GHA secrets in OSS.
-      - name: Login to Docker Hub
-        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # pin@v2.1.0
-        with:
-          username: ${{ endsWith(github.repository, '-enterprise') && steps.secrets.outputs.DOCKERHUB_USERNAME || secrets.DOCKERHUB_USERNAME }}
-          password: ${{ endsWith(github.repository, '-enterprise') && steps.secrets.outputs.DOCKERHUB_TOKEN || secrets.DOCKERHUB_TOKEN }}
-
-
       # Get go binary from workspace
       - name: fetch binary
         uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a # v3.0.2