[azure-pipelines] update azp from buster to bullseye (#2455)

Signed-off-by: maipbui maibui@microsoft.com
What I did
Update to bullseye to use python 3.9
How I did it
Change pipeline from buster to bullseye
How to verify it
Pass PR build checker

azure-pipelines.yml

@@ -26,7 +26,7 @@ stages:
       vmImage: ubuntu-20.04
 
     container:
-      image: sonicdev-microsoft.azurecr.io:443/sonic-slave-buster:latest
+      image: sonicdev-microsoft.azurecr.io:443/sonic-slave-bullseye:latest
 
     steps:
     - script: |
@@ -58,15 +58,15 @@ stages:
         sudo dpkg -i libyang_1.0.73_amd64.deb
         sudo dpkg -i libyang-cpp_1.0.73_amd64.deb
         sudo dpkg -i python3-yang_1.0.73_amd64.deb
-      workingDirectory: $(Pipeline.Workspace)/target/debs/buster/
+      workingDirectory: $(Pipeline.Workspace)/target/debs/bullseye/
       displayName: 'Install Debian dependencies'
 
     - task: DownloadPipelineArtifact@2
       inputs:
         source: specific
         project: build
         pipeline: 9
-        artifact: sonic-swss-common
+        artifact: sonic-swss-common.bullseye.amd64
         runVersion: 'latestFromBranch'
         runBranch: 'refs/heads/master'
       displayName: "Download sonic swss common deb packages"
@@ -86,14 +86,14 @@ stages:
         sudo pip3 install sonic_yang_models-1.0-py3-none-any.whl
         sudo pip3 install sonic_config_engine-1.0-py3-none-any.whl
         sudo pip3 install sonic_platform_common-1.0-py3-none-any.whl
-      workingDirectory: $(Pipeline.Workspace)/target/python-wheels/buster/
+      workingDirectory: $(Pipeline.Workspace)/target/python-wheels/bullseye/
       displayName: 'Install Python dependencies'
 
     - script: |
         set -ex
         # Install .NET CORE
         curl -sSL https://packages.microsoft.com/keys/microsoft.asc | sudo apt-key add -
-        sudo apt-add-repository https://packages.microsoft.com/debian/10/prod
+        sudo apt-add-repository https://packages.microsoft.com/debian/11/prod
         sudo apt-get update
         sudo apt-get install -y dotnet-sdk-5.0
       displayName: "Install .NET CORE"