Update tox file to include proxy as well

[nishant-dash]

Bug Description

From my testing, I need to modify the tox file to get it to run behind a proxy.

For example, if I want to run the uats now, I need to

[testenv:uats]
install_command = pip --proxy http://<IP>:<PORT> install -r requirements.txt 
commands = pytest -vv --tb native {[vars]driver_path} -s --model kubeflow {posargs}
deps =
    -r requirements.txt
description = Run UATs for Kubeflow and Integrations

and then run the uats target.

Perhaps this can be included in the tox file? with passenv

To Reproduce

N/A

Environment

Jammy VM

Relevant Log Output

pip install will time out

Additional Context

No response

[nishant-dash]

I see that #27 is open for the tests themselves