Feat: devcontainer pytest integration #422

Job	Run time
lint	17s
test-devcontainers (src/sample_pytorch_gpu_project, gpu-project)	4m 23s
test-devcontainers (src/sample_cpu_project, cpu-project)	1m 18s
test-notebooks	1m 4s
publish-test-results	15s
	7m 17s

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