Remove old python protobuf package before protobuf 3.21.12

Author: jimmyzhai

dockers/docker-sonic-mgmt/Dockerfile.j2

@@ -209,6 +209,8 @@ RUN mkdir -p /etc/apt/keyrings \
     && echo "deb [arch=`dpkg --print-architecture` signed-by=/etc/apt/keyrings/microsoft.gpg] https://packages.microsoft.com/repos/azure-cli/ `lsb_release -cs` main" | tee /etc/apt/sources.list.d/azure-cli.list \
     && apt-get update && apt-get install -y azure-cli
 
+# Remove old python protobuf package if existing
+RUN python3 -m pip show protobuf && python3 -m pip uninstall -y protobuf
 # Install protobuf 3.21.12 which is from https://deb.debian.org/debian/pool/main/p/protobuf/protobuf_3.21.12-3.dsc
 RUN mkdir -p /tmp/protobuf \
     && cd /tmp/protobuf \