Add test for executorlib interface (#158) #382

Job	Run time
black	14s
pip_check	54s
arithmetic	2m 21s
nfdi4ing	7m 11s
quantumespresso	26m 38s
documentation	42s
unittest_matrix (ubuntu-latest, 3.12)	58s
unittest_matrix (macos-latest, 3.12)	1m 26s
unittest_matrix (ubuntu-latest, 3.11)	1m 2s
coverage	1m 10s
	42m 36s

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