Tests

Added lock_shard guard to keep_alive #1953

Job	Run time
Python 3 / NVCC (CUDA 12.2)	2m 17s
Python 3.13-dev / ubuntu.latest [free-threaded]	1m 12s
gcc-8 on Ubuntu 20.04	49s
Python 3.8 / ubuntu-latest	52s
gcc-9 on Ubuntu 20.04	53s
Python 3.9 / ubuntu-latest	56s
Python 3.10 / ubuntu-latest	47s
clang-8 on Ubuntu 20.04	57s
Python 3.11 / ubuntu-latest	56s
clang-9 on Ubuntu 20.04	58s
clang-10 on Ubuntu 20.04	53s
Python 3.12 / ubuntu-latest	55s
Python 3.13.0-rc.2 / ubuntu-latest	1m 5s
Python pypy3.9-v7.3.16 / ubuntu-latest	1m 16s
Python pypy3.10-v7.3.17 / ubuntu-latest	1m 9s
Python 3.8 / windows-2022	2m 3s
Python 3.9 / windows-2022	2m 27s
Python 3.10 / windows-2022	1m 49s
Python 3.11 / windows-2022	2m 8s
Python 3.12 / windows-2022	1m 26s
Python 3.13.0-rc.2 / windows-2022	2m 30s
Python pypy3.9-v7.3.16 / windows-2022	3m 4s
Python pypy3.10-v7.3.17 / windows-2022	1m 59s
Python 3.8 / macos-13	1m 6s
Python 3.9 / macos-13	1m 38s
Python 3.10 / macos-13	1m 50s
Python 3.11 / macos-13	1m 12s
Python 3.12 / macos-13	1m 39s
Python 3.13.0-rc.2 / macos-13	2m 1s
Python pypy3.9-v7.3.16 / macos-13	1m 44s
Python pypy3.10-v7.3.17 / macos-13	1m 31s
	46m 2s

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