Feat: devcontainer pytest integration #425

Job	Run time
test-devcontainers (src/sample_pytorch_gpu_project, gpu-project)	4m 29s
test-devcontainers (src/sample_cpu_project, cpu-project)	1m 13s
test-notebooks	1m 12s
lint	25s
publish-test-results	16s
	7m 35s

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