Update to bullseye

Author: yaqiangz

.azure-pipelines/build.yml

@@ -31,11 +31,8 @@ jobs:
       displayName: install .Net
   - script: |
       set -ex
-      sed -i 's/http:\/\/deb.debian.org\/debian\/ buster-backports/http:\/\/archive.debian.org\/debian\/ buster-backports/g' /etc/apt/sources.list
       sudo apt-get update
       sudo apt-get install -y \
-          libboost1.67-dev \
-          libboost-serialization1.67-dev \
           libboost-system-dev \
           libboost-thread-dev \
           libboost-serialization-dev \
@@ -76,8 +73,8 @@ jobs:
       ${{ else }}:
         artifact: common-lib.${{ parameters.arch }}
       patterns: |
-        target/debs/buster/libyang-*.deb
-        target/debs/buster/libyang_*.deb
+        target/debs/bullseye/libyang-*.deb
+        target/debs/bullseye/libyang_*.deb
     displayName: "Download libyang from common lib"
   - script: |
       set -ex

azure-pipelines.yml

@@ -15,15 +15,15 @@ jobs:
     pool:
       vmImage: 'ubuntu-20.04'
     codeCoverage: true
-    containerImage: sonicdev-microsoft.azurecr.io:443/sonic-slave-buster:latest
+    containerImage: sonicdev-microsoft.azurecr.io:443/sonic-slave-bullseye:latest
 - template: .azure-pipelines/build.yml
   parameters:
     arch: arm64
     pool: sonicbld-arm64
-    containerImage: sonicdev-microsoft.azurecr.io:443/sonic-slave-buster-arm64:latest
+    containerImage: sonicdev-microsoft.azurecr.io:443/sonic-slave-bullseye-arm64:latest
 - template: .azure-pipelines/build.yml
   parameters:
     arch: armhf
     pool: sonicbld-armhf
-    containerImage: sonicdev-microsoft.azurecr.io:443/sonic-slave-buster-armhf:latest
+    containerImage: sonicdev-microsoft.azurecr.io:443/sonic-slave-bullseye-armhf:latest