petal 5: positional data fix

This raises CPU load of captouch from 3% to 7%. We think we golfed i2c to the minimum but it's still a lot of blocking calls. esp-idf 5.2 provides a sort-of nonblocking i2c lib, so this can be improved if we bump the version.

Cycle time for both chips is 18ms as before, this can be raised to 9ms(top)/14ms(bottom) but it increases the CPU load to 9% so we'll wait with this until we're not busyspinning anymore.

This also deprecates the "pressed" detection for individual petal pads for forward compat reasons, it always returns False for now. Use the overall petal pressed state plus position detection instead.