Add test process user #2260

Job	Run time
youki-build (x86_64, gnu)	1m 44s
youki-build (x86_64, gnu)	1m 44s
youki-build (x86_64, musl)	1m 59s
youki-build (x86_64, musl)	1m 59s
youki-build (aarch64, gnu)	1m 51s
youki-build (aarch64, gnu)	1m 51s
youki-build (aarch64, musl)	1m 57s
youki-build (aarch64, musl)	1m 57s
k8s-tests (x86_64, gnu)	1m 25s
k8s-tests (x86_64, gnu)	1m 25s
docker-in-docker (ubuntu-22.04)	19s
docker-in-docker (ubuntu-22.04)	12s
containerd-integration-tests (x86_64, gnu)	4m 37s
containerd-integration-tests (x86_64, gnu)	4m 37s
k8s-tests (x86_64, musl)	1m 33s
k8s-tests (x86_64, musl)	1m 33s
oci-validation-go (x86_64, gnu)	1m 37s
oci-validation-go (x86_64, gnu)	2m 2s
docker-in-docker (ubuntu-20.04)	13s
docker-in-docker (ubuntu-20.04)	13s
containerd-integration-tests (x86_64, musl)	4m 51s
containerd-integration-tests (x86_64, musl)	4m 51s
oci-validation-go (x86_64, musl)	1m 23s
oci-validation-go (x86_64, musl)	2m 10s
oci-validation-rust (x86_64, gnu)	2m 50s
oci-validation-rust (x86_64, gnu)	2m 50s
rootless-podman-test (x86_64, gnu)	1m 9s
rootless-podman-test (x86_64, gnu)	1m 9s
oci-validation-rust (x86_64, musl)	2m 56s
oci-validation-rust (x86_64, musl)	2m 56s
rootless-podman-test (x86_64, musl)	1m 18s
rootless-podman-test (x86_64, musl)	1m 18s
	1h 4m 29s

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