cmd/runtimetest/main.go: Unify validateMountsExist and validateMountsOrder#456

zhouhao3 merged 1 commit intoopencontainers:masteropencontainers/runtime-tools:masterfrom

wking:combine-mount-order-and-existence-checkswking/ocitools-v2:combine-mount-order-and-existence-checksCopy head branch name to clipboard