swarm/test: add integration test for 'swarm up' (#14353)

cmd/geth/accountcmd_test.go

cmd/geth/consolecmd_test.go

cmd/geth/dao_test.go

cmd/geth/genesis_test.go

cmd/geth/run_test.go

cmd/swarm/run_test.go

cmd/swarm/upload_test.go

internal/cmdtest/test_cmd.go

vendor/github.com/docker/docker/LICENSE

vendor/github.com/docker/docker/NOTICE

vendor/github.com/docker/docker/pkg/reexec/README.md

vendor/github.com/docker/docker/pkg/reexec/command_linux.go

vendor/github.com/docker/docker/pkg/reexec/command_unix.go

...ithub.com/docker/docker/pkg/reexec/command_unsupported.go

...or/github.com/docker/docker/pkg/reexec/command_windows.go

vendor/github.com/docker/docker/pkg/reexec/reexec.go

vendor/vendor.json