Reverted cython pin
reverts #33534 and closes #33507 
This might fail until tomorrow, after a new Cython wheel has been uploaded to that server. Yea makes sense. I'll refresh overnight --pre in this build is picking up this [Cython alpha](https://pypi.org/project/Cython/3.0a1/) so will have to wait new for alpha before this is potentially fixed. Yea thanks @alimcmaster1 - let’s come back to this when that happens