Array.prototype.sort - remove the need for compareFn to handle undefined values

[Brookke]

Array.prototype.sort - remove the need for compareFn to handle undefined values

Fixes #41708

[ghost]

All CLA requirements met.

[typescript-bot]

The TypeScript team hasn't accepted the linked issue #41708. If you can get it accepted, this PR will have a better chance of being reviewed.

[tjjfvi]

IMO a: Exclude<T, undefined> is a bit cleaner

[Brookke]

Happy to switch to a: Exclude<T, undefined> if that’s clearer. However I will await review and confirmation before switching :)

[sandersn]

The original issue #41708 needs to be added to #36554 before it will be accepted. In the meantime, I'd vote to close the PR because code tends to go stale pretty fast.

[Brookke]

Requested @sandersn. Is there anything else I need to do? Would love to see this issue closed :)

[sandersn]

We just need to make time to work through all issues with a significant update to Array. So far it hasn't made it to the front of our queue, though.

[sandersn]

To help with PR housekeeping, I'm going to close this PR until we finally update Array types.