Upgrade pyroute2 and improve cli response time

[vivekrnv]

What I did

• Older pyroute2 depends on distutils. Thus upgrade the version to latest to improve import time. A similar issue for natsort is reported here https://github.com/sonic-net/sonic-buildimage/issues/17246. However pyroute2 import is still heavy in bookworm and thus every CLI command is slow compared to bullseye.

<Bullseye>
root@msn2700:/home/admin# time python3 -c "import pyroute2"
real	0m0.378s
user	0m0.308s
sys	0m0.060s

<Before upgrade>
root@msn2700:/home/admin# time python3 -c "import pyroute2"
real        0m0.707s
user        0m0.425s
sys        0m0.097s

<After upgrade>
root@msn2700:/home/admin#  time python3 -c "import pyroute2"
real	0m0.511s
user	0m0.433s
sys	0m0.075s

• To fix this, i've delayed the pyroute2 import into the method where it is actually used, this has an improvement of 0.4 sec for all the CLI commands on slower CPU devices

root@msn2700:/home/admin#  time python3 -c "import utilities_common.cli as clicommon"
real	0m0.693s
user	0m0.579s
sys	0m0.109s

root@msn2700/home/admin#  time python3 -c "import utilities_common.cli as clicommon"
real	0m0.363s
user	0m0.271s
sys	0m0.072s

How I did it

How to verify it

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)