[Build]: Enable arm pr check #9362

Support marvell-armhf dpkg cache and the azp check.
Waiting for merging PR #9381 to 202012 branch, so only azp template change in this PR.

Move the VS build to a new stage BuildVS, change the Test stage only depending on BuildVS, running the BuildVS and the other platform's build in parallel. The Test stage do not has dependency on the marvel-armhf build, reduce the overall build time caused by longer build time of marvel-armhf build.

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

@@ -28,7 +28,7 @@ jobs:
       - template: cleanup.yml
       - ${{ parameters.preSteps }}
       - script: |
-          if [ -n "$(CACHE_MODE)" ] && echo $(PLATFORM_AZP) | grep -E -q "^(vs|broadcom|mellanox)$"; then
+          if [ -n "$(CACHE_MODE)" ] && echo $(PLATFORM_AZP) | grep -E -q "^(vs|broadcom|mellanox|marvell-armhf)$"; then
             CACHE_OPTIONS="SONIC_DPKG_CACHE_METHOD=$(CACHE_MODE) SONIC_DPKG_CACHE_SOURCE=/nfs/dpkg_cache/$(PLATFORM_AZP)"
             BUILD_OPTIONS="$(BUILD_OPTIONS) $CACHE_OPTIONS"
             echo "##vso[task.setvariable variable=BUILD_OPTIONS]$BUILD_OPTIONS"

azure-pipelines.yml

@@ -31,7 +31,7 @@ resources:
     endpoint: build
 
 stages:
-- stage: Build
+- stage: BuildVS
   pool: sonicbld
   variables:
     CACHE_MODE: rcache
@@ -43,10 +43,29 @@ stages:
       buildOptions: 'USERNAME=admin SONIC_BUILD_JOBS=$(nproc) ${{ variables.VERSION_CONTROL_OPTIONS }}'
       jobGroups:
       - name: vs
+
+- stage: Build
+  pool: sonicbld
+  dependsOn: []
+  variables:
+    CACHE_MODE: rcache
+    ${{ if eq(variables['Build.SourceBranchName'], '202012') }}:
+      VERSION_CONTROL_OPTIONS: 'SONIC_VERSION_CONTROL_COMPONENTS=deb,py2,py3,web,git,docker'
+  jobs:
+  - template: .azure-pipelines/azure-pipelines-build.yml
+    parameters:
+      buildOptions: 'USERNAME=admin SONIC_BUILD_JOBS=$(nproc) ${{ variables.VERSION_CONTROL_OPTIONS }}'
+      jobGroups:
       - name: broadcom
       - name: mellanox
+      - name: marvell-armhf
+        pool: sonicbld-armhf
+        timeoutInMinutes: 1200
+        variables:
+          PLATFORM_ARCH: armhf
 
 - stage: Test
+  dependsOn: BuildVS
   variables:
   - name: inventory
     value: veos_vtb