[ci] Install redis from Debian (#1777)

For the CI runner, install the python3 redis packages from the Ubuntu
repos instead of via pip. This has the advantage of the version being
fixed for the Debian version the test runner is using.

Also remove some development package installations, which shouldn't be
needed for running these tests.

This works around the regression for Unix sockets introduced in redis
7.2.0 (see also redis/redis-py#3957 and redis/redis-py#3957).

Signed-off-by: Saikrishna Arcot <sarcot@microsoft.com>

Author: saiarcot895

.azure-pipelines/test-docker-sonic-vs-template.yml

@@ -87,7 +87,7 @@ jobs:
   - script: |
       set -ex
       # install packages for vs test
-      sudo pip3 install pytest flaky exabgp docker redis
+      sudo pip3 install pytest flaky exabgp docker
 
       # install packages for kvm test
       sudo apt-get update
@@ -100,11 +100,9 @@ jobs:
           python3-libvirt \
           libzmq3-dev \
           libzmq5 \
-          libboost-serialization1.74.0 \
-          libboost1.74-dev \
-          libboost-dev \
           libhiredis0.14 \
           libpcre3-dev \
+          python3-redis \
           uuid-dev
 
       sudo sonic-sairedis/.azure-pipelines/build_and_install_module.sh