Attempt using GHA hosted Arm runners

.github/workflows/collector-builder.yml

@@ -109,16 +109,14 @@ jobs:
 
   build-builder-image:
     name: Build the builder image
-    runs-on: ubuntu-24.04
-    # Multiarch builds sometimes take for eeeeeeeeeever
-    timeout-minutes: 480
+    runs-on: ${{ (matrix.arch == 'amd64' && 'ubuntu-24.04') || 'ubuntu-24.04-arm' }}
     needs:
     - builder-needs-rebuilding
     if: needs.builder-needs-rebuilding.outputs.build-image == 'true'
     strategy:
       fail-fast: false
       matrix:
-        arch: [amd64]
+        arch: [amd64, arm64]
 
     env:
       PLATFORM: linux/${{ matrix.arch }}
@@ -130,12 +128,6 @@ jobs:
         with:
           submodules: true
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
       - name: Create ansible vars
         run: |
           cat << EOF > ${{ github.workspace }}/ansible/secrets.yml
@@ -171,7 +163,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        arch: [ppc64le, s390x, arm64]
+        arch: [ppc64le, s390x]
 
     env:
       PLATFORM: linux/${{ matrix.arch }}