[WIP] Backport 8.2: Python 3.13 support #9742

Job	Run time
macOS-13 - setuptools (CC=gcc-9 CXX=g++-9)	5m 4s
macOS-13 - cmake (CC=gcc-8 CXX=g++-8)	12m 14s
macOS-13 - cmake (CC=gcc-9 CXX=g++-9)	7m 57s
macOS-13 - cmake (-DNRN_ENABLE_CORENEURON=ONCC=gcc-7 CXX=g++-7)	6m 30s
macOS-13 - cmake (-DNRN_ENABLE_MPI=OFF -DNRN_ENABLE_INTERVIEWS=OFF -DNRN_ENABLE_CORENEURON=ONCC=gcc-7 CXX=g++-7)	6m 43s
macOS-13 - cmake (-DNRN_ENABLE_PYTHON=OFF -DNRN_ENABLE_RX3D=OFF -DNRN_ENABLE_CORENEURON=ONCC=gcc-10 CXX=g++-10)	5m 49s
ubuntu-20.04 - setuptools (CC=gcc-9 CXX=g++-9)	4m 58s
ubuntu-20.04 - cmake (CC=gcc-8 CXX=g++-8)	9m 46s
ubuntu-20.04 - cmake (CC=gcc-9 CXX=g++-9)	12m 51s
ubuntu-20.04 - cmake (-DNRN_ENABLE_CORENEURON=ONCC=gcc-7 CXX=g++-7)	8m 23s
ubuntu-20.04 - cmake (-DNRN_ENABLE_MPI=OFF -DNRN_ENABLE_INTERVIEWS=OFF -DNRN_ENABLE_CORENEURON=ONCC=gcc-7 CXX=g++-7)	4m 28s
ubuntu-20.04 - cmake (-DNRN_ENABLE_PYTHON=OFF -DNRN_ENABLE_RX3D=OFF -DNRN_ENABLE_CORENEURON=ONCC=gcc-10 CXX=g++-10)	6m 51s
ubuntu-22.04 - cmake (-DNRN_ENABLE_CORENEURON=ON -DNRN_ENABLE_INTERVIEWS=OFF -DCORENRN_SANITIZERS=undefined)	6m 46s
ubuntu-22.04 - cmake (-DNRN_ENABLE_CORENEURON=ON -DNRN_ENABLE_INTERVIEWS=OFF -DCORENRN_SANITIZERS=address)	16m 7s
Final CI	1s
	1h 54m 28s

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