[*.py] Resolve pylint w-class: W0102,W0107,W0212,W0221,W0223,W0237,W0404,W0611,W0612,W0621,W0622,W0631,W0707,W0718,W1201,W1203,W1309,W1514,W4901 ; [code_style.sh,.github/workflows/CPUTests.yml] Enable w-class

[SamuelMarks]

Description

Linting is fun?

Tests

N/A

Checklist

Before submitting this PR, please make sure (put X in square brackets):

• [x] I have performed a self-review of my code.
• [x] I have necessary comments in my code, particularly in hard-to-understand areas.
• [x] I have run end-to-end tests tests and provided workload links above if applicable.
• [x] I have made or will make corresponding changes to the doc if needed.