Upgrade linkmgrd to BULLSEYE (#60)

### Description of PR
Summary:
Fixes # (issue)

This PR is to upgrade linkmgrd to base image `BULLSEYE`. What is changed: 
1. Removing `dh-systemd`
The dependency on `dh-systemd` is blocking upgrading docker-mux to `bullseye` (sonic-net/sonic-buildimage#10498). Removing it now to unblock. 
1. Azure pipeline change
1. Replace dependency list with ${shlibs:Depends}

sign-off: Jing Zhang zhangjing@microsoft.com

#### How did you verify/test it?
Test building locally.

azure-pipelines.yml

@@ -20,7 +20,7 @@ jobs:
     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: |
@@ -32,27 +32,26 @@ jobs:
       sudo apt-get install -y dotnet-sdk-6.0
     displayName: install .Net
   - script: |
-      sudo apt-get install -y \
-          libboost1.71-dev \
-          libboost-program-options1.71-dev \
-          libboost-system1.71-dev \
-          libboost-thread1.71-dev \
-          libboost-atomic1.71-dev \
-          libboost-chrono1.71-dev \
-          libboost-container1.71-dev \
-          libboost-context1.71-dev \
-          libboost-contract1.71-dev \
-          libboost-coroutine1.71-dev \
-          libboost-date-time1.71-dev \
-          libboost-fiber1.71-dev \
-          libboost-filesystem1.71-dev \
-          libboost-graph-parallel1.71-dev \
-          libboost-log1.71-dev \
-          libboost-regex1.71-dev \
+      sudo apt-get install -y\
+          libboost-dev \
+          libboost-program-options-dev \
+          libboost-system-dev \
+          libboost-thread-dev \
+          libboost-atomic-dev \
+          libboost-chrono-dev \
+          libboost-container-dev \
+          libboost-context-dev \
+          libboost-contract-dev \
+          libboost-coroutine-dev \
+          libboost-date-time-dev \
+          libboost-fiber-dev \
+          libboost-filesystem-dev \
+          libboost-graph-parallel-dev \
+          libboost-log-dev \
+          libboost-regex-dev \
           googletest \
           libgtest-dev \
           libgmock-dev \
-          libgcc-8-dev \
           libhiredis0.14 \
           libhiredis-dev \
           libnl-3-dev \
@@ -98,30 +97,29 @@ jobs:
   timeoutInMinutes: 180
   pool: sonicbld-arm64
   container:
-    image: sonicdev-microsoft.azurecr.io:443/sonic-slave-buster-arm64:latest
+    image: sonicdev-microsoft.azurecr.io:443/sonic-slave-bullseye-arm64:latest
 
   steps:
   - script: |
-      sudo apt-get install -y \
-          libboost1.71-dev \
-          libboost-program-options1.71-dev \
-          libboost-system1.71-dev \
-          libboost-thread1.71-dev \
-          libboost-atomic1.71-dev \
-          libboost-chrono1.71-dev \
-          libboost-container1.71-dev \
-          libboost-context1.71-dev \
-          libboost-contract1.71-dev \
-          libboost-coroutine1.71-dev \
-          libboost-date-time1.71-dev \
-          libboost-fiber1.71-dev \
-          libboost-filesystem1.71-dev \
-          libboost-graph-parallel1.71-dev \
-          libboost-log1.71-dev \
-          libboost-regex1.71-dev \
+      sudo apt-get install -y\
+          libboost-dev \
+          libboost-program-options-dev \
+          libboost-system-dev \
+          libboost-thread-dev \
+          libboost-atomic-dev \
+          libboost-chrono-dev \
+          libboost-container-dev \
+          libboost-context-dev \
+          libboost-contract-dev \
+          libboost-coroutine-dev \
+          libboost-date-time-dev \
+          libboost-fiber-dev \
+          libboost-filesystem-dev \
+          libboost-graph-parallel-dev \
+          libboost-log-dev \
+          libboost-regex-dev \
           googletest \
           libgtest-dev \
-          libgcc-8-dev \
           libhiredis0.14 \
           libhiredis-dev \
           libnl-3-dev \
@@ -162,30 +160,29 @@ jobs:
   timeoutInMinutes: 180
   pool: sonicbld-armhf
   container:
-    image: sonicdev-microsoft.azurecr.io:443/sonic-slave-buster-armhf:latest
+    image: sonicdev-microsoft.azurecr.io:443/sonic-slave-bullseye-armhf:latest
 
   steps:
   - script: |
       sudo apt-get install -y \
-          libboost1.71-dev \
-          libboost-program-options1.71-dev \
-          libboost-system1.71-dev \
-          libboost-thread1.71-dev \
-          libboost-atomic1.71-dev \
-          libboost-chrono1.71-dev \
-          libboost-container1.71-dev \
-          libboost-context1.71-dev \
-          libboost-contract1.71-dev \
-          libboost-coroutine1.71-dev \
-          libboost-date-time1.71-dev \
-          libboost-fiber1.71-dev \
-          libboost-filesystem1.71-dev \
-          libboost-graph-parallel1.71-dev \
-          libboost-log1.71-dev \
-          libboost-regex1.71-dev \
+          libboost-dev \
+          libboost-program-options-dev \
+          libboost-system-dev \
+          libboost-thread-dev \
+          libboost-atomic-dev \
+          libboost-chrono-dev \
+          libboost-container-dev \
+          libboost-context-dev \
+          libboost-contract-dev \
+          libboost-coroutine-dev \
+          libboost-date-time-dev \
+          libboost-fiber-dev \
+          libboost-filesystem-dev \
+          libboost-graph-parallel-dev \
+          libboost-log-dev \
+          libboost-regex-dev \
           googletest \
           libgtest-dev \
-          libgcc-8-dev \
           libhiredis0.14 \
           libhiredis-dev \
           libnl-3-dev \

debian/control

@@ -3,16 +3,12 @@ Section: devel
 Priority: optional
 Maintainer: Tamer Ahmed <tamer.ahmed@microsoft.com>
 Build-Depends: debhelper (>= 8.0.0),
-               dh-systemd
 Standards-Version: 3.9.3
 Homepage: https://github.com/Azure/sonic-linkmgrd
 XS-Go-Import-Path: github.com/Azure/sonic-linkmgrd
 
 Package: sonic-linkmgrd
 Architecture: any
 Built-Using: ${misc:Built-Using}
-Depends: libboost-program-options1.71.0,
-         libboost-thread1.71.0,
-         libboost-date-time1.71.0,
-         libboost-log1.71.0
+Depends: ${shlibs:Depends}
 Description: SONiC LINK ManaGeR Daemon (linkmgrd)