[ci] Fix no enough space issue in docker root in multi arch build (#7321)

Why I did it
Failed to build the centec-arm64 for no space in docker data root.

How I did it
Change to use the data root to the folder under /data.
See detail info about DOCKER_DATA_ROOT_FOR_MULTIARCH in the file Makefile.work.

How to verify it
Set the environment variable, then the /data used as docker root.

.azure-pipelines/azure-pipelines-build.yml

@@ -24,6 +24,7 @@ jobs:
       PLATFORM_AZP: $(GROUP_NAME)
       PLATFORM_ARCH: amd64
       BUILD_OPTIONS: ${{ parameters.buildOptions }}
+      DOCKER_DATA_ROOT_FOR_MULTIARCH: /data/march/docker
       dbg_image: false
       swi_image: false
       raw_image: false

.azure-pipelines/azure-pipelines-image-template.yml

@@ -41,7 +41,6 @@ jobs:
           git checkout -b $(Build.SourceBranchName)
           sudo modprobe overlay
           sudo apt-get install -y acl
-          export DOCKER_DATA_ROOT_FOR_MULTIARCH=/data/march/docker
           sudo bash -c "echo 1 > /proc/sys/vm/compact_memory"
           ENABLE_DOCKER_BASE_PULL=y make PLATFORM=$(PLATFORM_AZP) PLATFORM_ARCH=$(PLATFORM_ARCH) configure
         displayName: 'Make configure'