tevent: 0.9.37 → 0.10.2

* Now requires Python 3
* Which was also coincidentally required to fix build (https://github.com/NixOS/nixpkgs/issues/82489)
* Also switch to wafhook

Changes:
* https://git.samba.org/samba.git/?p=samba.git;a=commit;h=1c73f38633ce40bcf19775fbeaf5e3baacdba9ab
* https://git.samba.org/samba.git/?p=samba.git;a=commit;h=db58a50296041ca57675daee15caea8850f1d3f8
* https://git.samba.org/samba.git/?p=samba.git;a=commit;h=6f2278018436184785e19f69efc60ec408b14aa7
* https://git.samba.org/samba.git/?p=samba.git;a=commit;h=123267138e993c6a87990c0022e89f4970c0ac12
* https://git.samba.org/samba.git/?p=samba.git;a=commit;h=4aea5c0972de53c143530cc42ef6d3b8cfafb973