Added libpci and pciutils to the pmon docker (sonic-net#12684)

This enables the pcied daemon to call the corresponding system commands needed for pci transactions

dockers/docker-platform-monitor/Dockerfile.j2

@@ -27,6 +27,7 @@ RUN apt-get update &&   \
         python3-jsonschema \
         libpci3         \
         iputils-ping    \
+        pciutils        \
 # smartmontools version should match the installed smartmontools in sonic_debian_extension build template
         smartmontools=7.2-1
 
@@ -41,6 +42,9 @@ RUN pip3 install grpcio==1.39.0 \
 # Barefoot platform vendors' sonic_platform packages import the Python 'thrift' library
 RUN pip3 install thrift==0.13.0
 
+# We install the libpci module in order to be able to do PCI transactions
+RUN pip3 install libpci
+
 {% if docker_platform_monitor_debs.strip() -%}
 # Copy locally-built Debian package dependencies
 {{ copy_files("debs/", docker_platform_monitor_debs.split(' '), "/debs/") }}