ci: use github hosted runners for multiarch docker builds

Author: ricky-undeadcoders

.github/workflows/build.yml

@@ -29,11 +29,12 @@ jobs:
     permissions:
       contents: read
       id-token: write
-    uses: grafana/shared-workflows/.github/workflows/docker-build-push-multiarch.yml@4101b7ff332a47ef03b59a554624800a61668090 # main
+    uses: grafana/shared-workflows/.github/workflows/docker-build-push-multiarch.yml@f1d0430dd8ec0caaa90a1f339c9e6918ee11473b # rwhitaker/docker-build-push-multiarch-runner-types
     with:
       platforms: linux/amd64,linux/arm64
       tags: |
         type=ref,event=branch,enable={{is_default_branch}}
         type=semver,pattern={{version}},value=${{ inputs.tag }},enable=${{ inputs.tag != '' }}
       push: ${{ github.event_name == 'push' || github.event_name == 'workflow_call' }}
       registries: "dockerhub"
+      runner-type: github