Python: Pysdk issue 3980 (via rewrlution)

[moonbox3]

Motivation and Context

Handling @rewrlution's PR due to permission issues. Fixes #3980. Original PR is: #5063.

This PR is to add a Python coverage comment GitHub action to the CICD workflow, so that comments related to coverage change will be posted to a PR automatically.

In this PR:

1. I updated the DEV_SETUP.md to include some instructions on how to enable pre-commit
2. I added the coverage package as the dev dependency
3. I updated the .coveragerc file so that .coverage is generated in relative path
4. I added the workflow for generating and posting coverage comments.

Description

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[moonbox3]

Closing as this has been implemented.