fix: WCOW: add powershell.exe dir to default PATH for backward compatibiliy #5235

Job	Run time
prepare	5s
govulncheck	1m 6s
binaries (darwin/amd64)	58s
binaries (darwin/arm64)	57s
binaries (linux/amd64)	1m 54s
binaries (linux/arm/v7)	1m 56s
binaries (linux/arm64)	1m 53s
binaries (linux/s390x)	1m 58s
binaries (linux/ppc64le)	2m 8s
binaries (linux/riscv64)	2m 13s
binaries (windows/amd64)	1m 36s
binaries (windows/arm64)	1m 49s
test / prepare	2m 21s
test / run (containerd, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	8m 3s
test / run (containerd-rootless, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integr...	9m 36s
test / run (containerd-1.6, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	7m 36s
test / run (containerd-snapshotter-stargz, ./client ./cmd/buildctl ./worker/containerd ./solver ./fronte...	8m 31s
test / run (oci, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	5m 21s
test / run (oci-rootless, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	5m 16s
test / run (oci-rootless-slirp4netns-detachnetns, ./client ./cmd/buildctl ./worker/containerd ./solver ....	5m 3s
test / run (oci-snapshotter-stargz, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, int...	5m 6s
test / run (./..., 1, integration gateway)	4m 27s
test / run (./client, containerd, nydus, integration)	7m 36s
test / run (./client, oci, nydus, integration)	5m 2s
test / run (./..., nydus, 1, integration)	4m 17s
image	8m 51s
image (rootless)	8m 57s
release	7s
scout	0s
	1h 54m 43s

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