[fiodortretyakov]

- What I did

Added a windows/arm64 client package to the cross-win target: the CLI is built for windows/arm64 with the same bake target as amd64 and zipped as build/win/arm64/docker-<version>.zip. It holds docker.exe only, since dockerd isn't built for windows/arm64.

docker/cli already builds windows/arm64 (cross and bin-image-cross in its docker-bake.hcl), but https://download.docker.com/win/static/stable/ only has x86_64/, so a Windows on Arm machine has no native CLI to use with an engine in WSL 2 or on a remote host. winget's Docker.DockerCLI is built from these zips, so it is x64 only as well.

Publishing also needs the release pipeline to upload build/win/arm64 to win/static/stable/aarch64/, the way build/mac/arm64 goes to mac/static/stable/aarch64/. That pipeline isn't public, so that part isn't in this PR.

- How I verified it

make DOCKER_CLI_REF=v29.9.2 checkout-cli, then make -C static -o cross-win-engine cross-win VERSION=29.9.2, on an arm64 Linux engine. -o cross-win-engine skips the Windows engine build; dockerd.exe came from the released 29.9.2 zip. Both zips are produced, and the amd64 one has the same layout as the released zip.

docker.exe from build/win/arm64/docker-29.9.2.zip is an ARM64 binary and runs natively on Windows 11 arm64 (Snapdragon X Elite) against Docker Engine 29.9.2 in WSL 2 over TLS: docker version shows OS/Arch: windows/arm64, and docker info, docker run --rm, docker cp in both directions (files and directories, Windows paths) and bind mounts (-v and --mount) work.

- Description for the changelog

Add a static Docker CLI package for Windows on Arm (windows/arm64)

[fiodortretyakov]

Closing this as superseded: docker-ce-packaging is deprecated in favor of docker/packaging (#1366), which already builds the windows/arm64 static packages, and download.docker.com/win/static/test/aarch64/ has 29.10.0-rc.1.