Run integration tests with all clusters periodically #649

Job	Run time
Run linting/pre-commit checks	43s
unit-tests (ubuntu-latest, 3.8)	1m 26s
unit-tests (ubuntu-latest, 3.9)	1m 37s
unit-tests (ubuntu-latest, 3.10)	1m 30s
unit-tests (ubuntu-latest, 3.11)	1m 53s
unit-tests (windows-latest, 3.8)	2m 35s
unit-tests (windows-latest, 3.9)	2m 42s
unit-tests (windows-latest, 3.10)	3m 3s
unit-tests (windows-latest, 3.11)	3m 24s
unit-tests (macos-latest, 3.8)	1m 45s
unit-tests (macos-latest, 3.9)	2m 2s
unit-tests (macos-latest, 3.10)	1m 16s
unit-tests (macos-latest, 3.11)	2m 22s
integration tests with a mock slurm cluster (ubuntu-latest, 3.8)	3m 52s
integration tests with a mock slurm cluster (ubuntu-latest, 3.9)	3m 21s
integration tests with a mock slurm cluster (ubuntu-latest, 3.10)	3m 34s
integration tests with a mock slurm cluster (ubuntu-latest, 3.11)	3m 51s
integration tests with a real SLURM cluster (3.11, mila) / integration tests with a real SLURM cluster	5m 33s
	46m 29s

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