[ci] Add azure pipeline to build common libs. (#10367)

Why I did it
To remove reference on Azure.sonic-buildimage artifacts.
Azure.sonic-buildimage has a higher failure rate.

.azure-pipelines/build-commonlib.yml

@@ -0,0 +1,19 @@
+pr: none
+trigger: none
+schedules:
+- cron: "0 0 * * *"
+  displayName: Daily build
+  branches:
+    include:
+      - master
+      - 202???
+resources:
+  repositories:
+  - repository: buildimage
+    type: github
+    name: Azure/sonic-buildimage
+    ref: master
+    endpoint: build
+
+jobs:
+- template: .azure-pipelines/template-commonlib.yml@buildimage

.azure-pipelines/template-commonlib.yml

@@ -0,0 +1,34 @@
+jobs:
+- job: Build
+  timeoutInMinutes: 120
+  pool: sonicbld
+  steps:
+  - checkout: self
+    clean: true
+    submodules: recursive
+  - script: |
+      set -ex
+      case $(Build.SourceBranchName) in
+        202012 | 202106)
+          bldenv=buster
+          ;;
+        *)
+          bldenv=bullseye
+          ;;
+      esac
+      BLDENV=$bldenv make -f Makefile.work configure PLATFORM=vs ENABLE_DOCKER_BASE_PULL=y
+      echo "##vso[task.setvariable variable=bldenv;]$bldenv"
+    displayName: Make configure
+  - script: |
+      set -ex
+      LIBNL3_VERSION_BASE=$(grep "LIBNL3_VERSION_BASE =" rules/libnl3.mk | awk '{print$3}')
+      LIBNL3_VERSION=$(grep "LIBNL3_VERSION =" rules/libnl3.mk | awk '{print$3}' | sed -e "s/(//" -e "s/)//" -e "s/\\$//" -e "s/LIBNL3_VERSION_BASE/$LIBNL3_VERSION_BASE/")
+      BLDENV=$(bldenv) make -f Makefile.work target/debs/$(bldenv)/libnl-3-200_${LIBNL3_VERSION}_amd64.deb ENABLE_DOCKER_BASE_PULL=y
+
+      LIBYANG_VERSION_BASE=$(grep "LIBYANG_VERSION_BASE =" rules/libyang.mk | awk '{print$3}')
+      LIBYANG_VERSION=$(grep "LIBYANG_VERSION =" rules/libyang.mk | awk '{print$3}' | sed -e "s/\\$//" -e "s/(//" -e "s/)//" -e "s/LIBYANG_VERSION_BASE/$LIBYANG_VERSION_BASE/")
+      BLDENV=$(bldenv) make -f Makefile.work target/debs/$(bldenv)/libyang_${LIBYANG_VERSION}_amd64.deb
+      find target -name *.deb | xargs -i cp {} $(Build.ArtifactStagingDirectory)
+    displayName: Make common lib packages
+  - publish: $(Build.ArtifactStagingDirectory)
+    artifact: common-lib