Build multiarch images on native GitHub runners

[rajathagasthya]

This commit makes the following changes:

1. Builds multiarch images for non-release commits/PRs, in addition to released versions.
2. Runs the docker build for an arch on the respective GitHub runner (e.g. a linux/amd64 docker image will be built on a linux/amd64 runner). This native build reduces build times due to not requring emulation.
3. Removes explicit use if buildx for docker build. Buildx is now the default builder in Docker. Also removes the related QEMU setup.

[tariq1890]

/ok to test 2665f5f

[tariq1890]

LGTM. Thanks @rajathagasthya !

Let's get @elezar's review before merging

[elezar]

Is using a matrix strategy possible, or is not possible to use the target to define the runs-on?

[elezar]

Seems like it might be: https://docs.github.com/en/actions/how-tos/write-workflows/choose-what-workflows-do/run-job-variations#excluding-matrix-configurations

[elezar]

Something like:

diff --git a/.github/workflows/image.yaml b/.github/workflows/image.yaml
index 4cb7ce784..1937ddffd 100644
--- a/.github/workflows/image.yaml
+++ b/.github/workflows/image.yaml
@@ -22,8 +22,13 @@ on:
         type: string
 
 jobs:
-  build-amd64:
-    runs-on: linux-amd64-cpu4
+  build:
+    strategy:
+      matrix:
+        arch:
+          - amd64
+          - arm64
+    runs-on: linux-${{ matrix.arch }}-cpu4
     permissions:
       contents: read
       id-token: write
@@ -43,45 +48,16 @@ jobs:
       - name: Build image
         env:
           IMAGE_NAME: ghcr.io/nvidia/k8s-device-plugin
-          VERSION: ${{ inputs.version }}-amd64
+          VERSION: ${{ inputs.version }}-${{ matrix.arch }}
           PUSH_ON_BUILD: true
           GOPROXY: ${{ steps.setup-go-proxy.outputs.goproxy-url }}
-          DOCKER_BUILD_PLATFORM_OPTIONS: "--platform=linux/amd64"
+          DOCKER_BUILD_PLATFORM_OPTIONS: "--platform=linux/${{ matrix.arch }}"
         run: |
           echo "${VERSION}"
           make -f deployments/container/Makefile build
 
-  build-arm64:
-    runs-on: linux-arm64-cpu4
-    permissions:
-      contents: read
-      id-token: write
-      packages: write
-    steps:
-      - uses: actions/checkout@v5
-        name: Check out code
-      - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Setup Go Proxy
-        id: setup-go-proxy
-        uses: nv-gha-runners/setup-artifactory-go-proxy@main
-      - name: Build image
-        env:
-          IMAGE_NAME: ghcr.io/nvidia/k8s-device-plugin
-          VERSION: ${{ inputs.version }}-arm64
-          PUSH_ON_BUILD: true
-          GOPROXY: ${{ steps.setup-go-proxy.outputs.goproxy-url }}
-          DOCKER_BUILD_PLATFORM_OPTIONS: "--platform=linux/arm64"
-        run: |
-          echo "${VERSION}"
-          make -f deployments/container/Makefile build
-
-  build-multi-arch-images:
-    needs: [ build-arm64, build-amd64 ]
+  create-manifest:
+    needs: [ build ]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5
@@ -94,12 +70,10 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build Manifest
         env:
-          IMAGE_ARM: ghcr.io/nvidia/k8s-device-plugin:${{ inputs.version }}-arm64
-          IMAGE_AMD: ghcr.io/nvidia/k8s-device-plugin:${{ inputs.version }}-amd64
           MULTIARCH_IMAGE: ghcr.io/nvidia/k8s-device-plugin:${{ inputs.version }}
         run: |
           docker manifest create \
             ${MULTIARCH_IMAGE} \
-            ${IMAGE_AMD} \
-            ${IMAGE_ARM}
+            ghcr.io/nvidia/k8s-device-plugin:${{ inputs.version }}-amd64 \
+            ghcr.io/nvidia/k8s-device-plugin:${{ inputs.version }}-arm64
           docker manifest push ${MULTIARCH_IMAGE}

?