Update python to 3.8.16 to fix CVE-2022-3754

What does this MR do?

Updates python to version 3.8.16 to fix CVE-2022-3754.

Related issues

Related gitlab-org/charts/gitlab#4051

Test plan

Check following containers:

• gitlab-python
• gitlab-sidekiq-ce
• gitlab-sidekiq-ee
• gitlab-toolbox-ce
• gitlab-toolbox-ee
• gitlab-webservice-ce
• gitlab-webservice-ee

Using the following test:

docker run -it --rm --entrypoint python3 <container> --version

The python3 --version command should return Python 3.8.16.

• Green pipeline for trigger-chart-test.

Checklist

See Definition of done.

For anything in this list which will not be completed, please provide a reason in the MR discussion

Required

• Merge Request Title, and Description are up to date, accurate, and descriptive
• MR targeting the appropriate branch
• MR has a green pipeline on GitLab.com

Expected (please provide an explanation if not completing)

• Test plan indicating conditions for success has been posted and passes
• Documentation created/updated
• Integration tests added to GitLab QA
• The impact any change in container size has should be evaluated