Typing specification update: Allow bare `typing.ClassVar` qualifiers

[Viicos]

I'd like to request that the TC consider adoption of a typing spec update that allows bare typing.ClassVar qualifiers

TC Sign-off

• Carl
• Eric
• Jelle
• Jukka
• Rebecca

Links to PR & Discussion
The PR can be found here. The latest draft incorporates feedback from PR reviews and the discussion.

The discussion can be found here.

[erictraut]

@JukkaL, please review this when you have a chance and post any concerns / feedback or sign off.