Build eventlet-0.30.2
    
    Plus, we remove one patch which is dealing with py3.10
    particularities.
    u-c is currently 0.30.2 [1]
    
    [1] https://github.com/openstack/requirements/blob/41788be53d8ecb250dde099d4379f593e21a8ba2/upper-constraints.txt#L157
    
    Related-to: https://review.rdoproject.org/r/q/Ic44f598c7231e58d55a53fa21c8711800e09ec89