Fix docker-env with new PowerShell versions

[spowelljr]

Fixes #12860

Implements machine-drivers/machine#37

Using the latest version of PowerShell from https://github.com/PowerShell/PowerShell resulted in me getting the error There are no more files. when running shell.Detect().

The error is coming from https://github.com/machine-drivers/machine/blob/master/libmachine/shell/shell_windows.go#L34 after being called from https://github.com/machine-drivers/machine/blob/master/libmachine/shell/shell_windows.go#L67.

The reason it's even hitting those parts of the code is because the .exe file of the new PowerShell is pwsh.exe while we're only checking for powershell.

Added a mapping from pwsh to powershell.

[sharifelgamal]

/ok-to-test

[minikube-pr-bot]

kvm2 driver with docker runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 12870) |
+----------------+----------+---------------------+
| minikube start | 47.0s    | 46.7s               |
| enable ingress | 30.4s    | 31.0s               |
+----------------+----------+---------------------+

Times for minikube ingress: 30.3s 30.7s 30.3s 30.3s 30.2s
Times for minikube (PR 12870) ingress: 30.3s 30.8s 30.7s 31.7s 31.3s

Times for minikube start: 49.4s 46.1s 48.1s 45.5s 45.9s
Times for minikube (PR 12870) start: 47.1s 46.1s 47.4s 46.1s 47.0s

docker driver with docker runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 12870) |
+----------------+----------+---------------------+
| minikube start | 22.1s    | 21.3s               |
| enable ingress | 26.6s    | 30.3s               |
+----------------+----------+---------------------+

Times for minikube start: 22.5s 20.9s 22.8s 21.1s 23.2s
Times for minikube (PR 12870) start: 20.5s 20.4s 21.5s 22.8s 21.2s

Times for minikube (PR 12870) ingress: 28.5s 33.9s 33.9s 28.4s 26.9s
Times for minikube ingress: 25.9s 26.9s 26.4s 27.5s 26.4s

docker driver with containerd runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 12870) |
+----------------+----------+---------------------+
| minikube start | 40.1s    | 40.5s               |
| enable ingress | 31.9s    | 31.8s               |
+----------------+----------+---------------------+

Times for minikube start: 26.6s 43.6s 43.4s 43.7s 43.2s
Times for minikube (PR 12870) start: 42.9s 43.3s 30.2s 43.3s 43.0s

Times for minikube ingress: 32.9s 31.9s 31.9s 31.4s 31.4s
Times for minikube (PR 12870) ingress: 26.9s 31.4s 37.5s 31.4s 31.9s

[minikube-pr-bot]

These are the flake rates of all failed tests.

Environment	Failed Tests	Flake Rate (%)
none_Linux	TestFunctional/serial/ExtraConfig (gopogh)	0.00 (chart)
Hyper-V_Windows	TestStartStop/group/default-k8s-different-port/serial/Pause (gopogh)	3.74 (chart)
none_Linux	TestFunctional/serial/ComponentHealth (gopogh)	4.91 (chart)
KVM_Linux_containerd	TestStoppedBinaryUpgrade/Upgrade (gopogh)	6.17 (chart)
Hyper-V_Windows	TestNetworkPlugins/group/flannel/Start (gopogh)	22.43 (chart)
Hyper-V_Windows	TestNetworkPlugins/group/bridge/Start (gopogh)	26.17 (chart)
Docker_Windows	TestNetworkPlugins/group/kindnet/Start (gopogh)	28.57 (chart)
Hyper-V_Windows	TestNetworkPlugins/group/kubenet/Start (gopogh)	28.97 (chart)
Docker_Windows	TestNetworkPlugins/group/enable-default-cni/DNS (gopogh)	75.40 (chart)
Docker_Windows	TestNetworkPlugins/group/bridge/DNS (gopogh)	82.26 (chart)
Docker_Windows	TestNetworkPlugins/group/kubenet/DNS (gopogh)	83.87 (chart)
Docker_Windows	TestNetworkPlugins/group/calico/Start (gopogh)	84.92 (chart)
Hyper-V_Windows	TestNoKubernetes/serial/StartNoArgs (gopogh)	86.21 (chart)
Docker_Linux_containerd	TestScheduledStopUnix (gopogh)	100.00 (chart)
Docker_Windows	TestMountStart/serial/RestartStopped (gopogh)	100.00 (chart)
Docker_Windows	TestMountStart/serial/StartWithMountFirst (gopogh)	100.00 (chart)
Docker_Windows	TestMountStart/serial/StartWithMountSecond (gopogh)	100.00 (chart)
Docker_Windows	TestMountStart/serial/Stop (gopogh)	100.00 (chart)
Docker_Windows	TestMountStart/serial/VerifyMountFirst (gopogh)	100.00 (chart)
Docker_Windows	TestMountStart/serial/VerifyMountPostDelete (gopogh)	100.00 (chart)
Docker_Windows	TestMountStart/serial/VerifyMountPostStop (gopogh)	100.00 (chart)
Docker_Windows	TestMountStart/serial/VerifyMountSecond (gopogh)	100.00 (chart)
Docker_Windows	TestPause/serial/VerifyDeletedResources (gopogh)	100.00 (chart)
Hyper-V_Windows	TestMultiNode/serial/PingHostFrom2Pods (gopogh)	100.00 (chart)
Hyper-V_Windows	TestMultiNode/serial/RestartKeepsNodes (gopogh)	100.00 (chart)
Hyper-V_Windows	TestRunningBinaryUpgrade (gopogh)	100.00 (chart)
Hyper-V_Windows	TestStoppedBinaryUpgrade/Upgrade (gopogh)	100.00 (chart)

To see the flake rates of all tests by environment, click here.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: sharifelgamal, spowelljr

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [sharifelgamal,spowelljr]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment