Update `model.PoseEstimation` to infer_output_dir #126

Job	Run time
tests (3.9, 8.0)	13s
tests (3.9, 5.7)	10s
tests (3.10, 8.0)	14s
tests (3.10, 5.7)	13s
tests (3.8, 5.7)	12s
tests (3.7, 5.7)	11s
devcontainer-build / devcontainer-build	17m 53s
	19m 6s

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