ch58x-hal

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This PR updates all dependencies and makes the changes required for them to work, so new versions of embassy and related packages can be used.

• Rewrote the time driver as the upstream interface has changed
• Replaced .variant functions from svd2rust with .bits
• Replaced interrupt signatures with #[qingke_rt::interrupt]
• Removed unnecessary unsafe blocks

Only systick and gpio have currently been tested, with a ch583. Note that the risc32 embassy driver does not work properly with qingke chips without further changes which I'm working on for a future PR.

Ideally the .variant change can be reverted by adding enums to the svd files in ch32-rs.

Depends on https://github.com/ch32-rs/ch32-rs/pull/22

Note: The old time driver implementation had a potential race condition where the systick cmp value could end up set below cnt, which won't interrupt. I'm fairly sure other chXXX crates have similar issues.