[ci] Support the cross build for armhf/arm64 (#11587)

Why I did it
[ci] Support the cross build for armhf/arm64

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

@@ -16,6 +16,9 @@ parameters:
 - name: 'jobGroups'
   type: object
   default: ''
+- name: 'qemuOrCrossBuild'
+  type: boolean
+  default: false
 
 jobs:
 - template: azure-pipelines-image-template.yml
@@ -36,6 +39,9 @@ jobs:
       docker_syncd_rpc_image: no
       syncd_rpc_image: no
       platform_rpc: no
+      ${{ if parameters.qemuOrCrossBuild }}:
+        SONIC_SLAVE_DOCKER_DRIVER: 'vfs'
+        CACHE_MODE: 'none'
     ${{ if ne(parameters.jobGroups, '') }}:
       jobGroups: ${{ parameters.jobGroups }}
     ${{ if eq(parameters.jobGroups, '') }}:
@@ -67,7 +73,8 @@ jobs:
             platform_rpc: centec
 
         - name: centec-arm64
-          pool: sonicbld-arm64
+          ${{ if not(parameters.qemuOrCrossBuild) }}:
+            pool: sonicbld-arm64
           timeoutInMinutes: 2880
           variables:
             PLATFORM_ARCH: arm64
@@ -81,7 +88,8 @@ jobs:
             dbg_image: yes
 
         - name: marvell-armhf
-          pool: sonicbld-armhf
+          ${{ if not(parameters.qemuOrCrossBuild) }}:
+            pool: sonicbld-armhf
           timeoutInMinutes: 2880
           variables:
             PLATFORM_ARCH: armhf

.azure-pipelines/official-build.yml

@@ -44,3 +44,5 @@ stages:
     parameters:
       buildOptions: 'USERNAME=admin SONIC_BUILD_JOBS=$(nproc) ${{ variables.VERSION_CONTROL_OPTIONS }}'
       jobFilters: none
+      ${{ if contains(variables['Build.DefinitionName'], 'cross') }}:
+        qemuOrCrossBuild: true