Refactor and overhaul test_official

[harshil21]

Closes #3874

Features of the overhauled test_official:

• Modularized
• Scraping is now done in the beginning and is conveniently wrapped in python classes, and is frozen since it represents the ground truth.
• Logging: some logging statements are used in the check_param_type function. If you run pytest with --log-level=DEBUG and that test fails, you'll see the logged statements.
• Major simplification for check_param_type function. See Refactor and overhaul test_official #4087 (comment) and f5704da 's commit message.
• Some simplification in other places and more documentation

If you see any more areas of improvement, feel free to mention it.

[Bibo-Joshi]

I scrolled through the changes and didn't see anything that made me want to leave a comment. IISC much of the changes are reorderings, additional comments & extraction of methods, so I've seen most of the code before as well. - Which is ofc not meant to downplay the work you've put into this PR and the gain in maintenability this brings!

You added the do-not-merge label. Do you want to merge after API 7.0?

[harshil21]

I scrolled through the changes and didn't see anything that made me want to leave a comment. IISC much of the changes are reorderings, additional comments & extraction of methods, so I've seen most of the code before as well. - Which is ofc not meant to downplay the work you've put into this PR and the gain in maintenability this brings!

yeah there are just tiny changes here and there to make it easier to maintain, but the code is largely the same.

You added the do-not-merge label. Do you want to merge after API 7.0?

Yes, and that would also give me time to see if I can simplify / improve the check_param_type function..

[harshil21]

Latest commits significantly improve check_param_type function, reducing lines of code for that function by 66.4% (excluding newly added logging code)

As a result of simplification, it also found incorrect type hints which went undetected before. There was also further "modularization" making the code easier to follow.

To be merged after #4089, #4088, and #4034.

[Bibo-Joshi]

Sorry again for the merge mess-up and big kudos for the PR!