Fix buildx cache + change runner type (#2176)

* Update build.yaml

* Update build.yaml

* change to S3 cache

* change to CPU Runners

* remove comments

.github/workflows/build.yaml

@@ -28,7 +28,7 @@ jobs:
       group: ${{ github.workflow }}-build-and-push-image-${{ inputs.hardware }}-${{ github.head_ref || github.run_id }}
       cancel-in-progress: true
     # TODO see with @Glegendre to get CPU runner here instead
-    runs-on: [self-hosted, nvidia-gpu , multi-gpu, 4-a10, ci]
+    runs-on: [self-hosted, intel-cpu, 32-cpu, 256-ram, ci]
     permissions:
       contents: write
       packages: write
@@ -136,8 +136,8 @@ jobs:
             DOCKER_LABEL=sha-${{ env.GITHUB_SHA_SHORT }}${{ env.LABEL }}
           tags: ${{ steps.meta.outputs.tags || steps.meta-pr.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels || steps.meta-pr.outputs.labels }}          
-          cache-from: type=registry,ref=registry-push.github-runners.huggingface.tech/api-inference/community/text-generation-inference:cache${{ env.LABEL }},mode=min
-          cache-to: type=registry,ref=registry-push.github-runners.huggingface.tech/api-inference/community/text-generation-inference:cache${{ env.LABEL }},mode=min
+          cache-from: type=s3,region=us-east-1,bucket=ci-docker-buildx-cache,name=text-generation-inference-cache${{ env.LABEL }},mode=min,access_key_id=${{ secrets.S3_CI_DOCKER_BUILDX_CACHE_ACCESS_KEY_ID }},secret_access_key=${{ secrets.S3_CI_DOCKER_BUILDX_CACHE_SECRET_ACCESS_KEY }},mode=min
+          cache-to: type=s3,region=us-east-1,bucket=ci-docker-buildx-cache,name=text-generation-inference-cache${{ env.LABEL }},mode=min,access_key_id=${{ secrets.S3_CI_DOCKER_BUILDX_CACHE_ACCESS_KEY_ID }},secret_access_key=${{ secrets.S3_CI_DOCKER_BUILDX_CACHE_SECRET_ACCESS_KEY }},mode=min
       - name: Final
         id: final
         run: |