bump pytest from 7.3.1 to 7.4.0 #2625

Job	Run time
mlserver (ubuntu-latest, 3.8, true)	24m 53s
mlserver (ubuntu-latest, 3.9, true)	32m 1s
mlserver (ubuntu-latest, 3.10, true)	30m 10s
runtimes (ubuntu-latest, 3.8, sklearn, true)	2m 23s
runtimes (ubuntu-latest, 3.8, xgboost, true)	2m 42s
runtimes (ubuntu-latest, 3.8, lightgbm, true)	2m 43s
runtimes (ubuntu-latest, 3.8, mlflow, true)	8m 8s
runtimes (ubuntu-latest, 3.8, huggingface, true)	4m 45s
runtimes (ubuntu-latest, 3.8, alibi-explain, true)	12m 24s
runtimes (ubuntu-latest, 3.8, alibi-detect, true)	5m 0s
runtimes (ubuntu-latest, 3.9, sklearn, true)	2m 28s
runtimes (ubuntu-latest, 3.9, xgboost, true)	3m 2s
runtimes (ubuntu-latest, 3.9, lightgbm, true)	2m 39s
runtimes (ubuntu-latest, 3.9, mlflow, true)	9m 3s
runtimes (ubuntu-latest, 3.9, huggingface, true)	5m 25s
runtimes (ubuntu-latest, 3.9, alibi-explain, true)	8m 55s
runtimes (ubuntu-latest, 3.9, alibi-detect, true)	3m 59s
runtimes (ubuntu-latest, 3.10, sklearn, true)	2m 41s
runtimes (ubuntu-latest, 3.10, xgboost, true)	2m 44s
runtimes (ubuntu-latest, 3.10, lightgbm, true)	2m 41s
runtimes (ubuntu-latest, 3.10, mlflow, true)	7m 58s
runtimes (ubuntu-latest, 3.10, huggingface, true)	5m 49s
runtimes (ubuntu-latest, 3.10, alibi-explain, true)	11m 8s
runtimes (ubuntu-latest, 3.10, alibi-detect, true)	5m 2s
all-runtimes	0s
lint	4m 24s
	3h 23m 7s

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