Add a Windows regression test for --mac-address

[robmry]

Description

Try to implement a Windows regression test for the fix in #47233 (as described in its "how to verify").,

Reproduce

See the PR.

Expected behavior

There's a regression test.

docker version

n/a

docker info

n/a

Additional Info

No response

[robmry]

This turned out to be quite tricky ... the Windows tests all run under a single instance of the daemon, there's no existing way to set up a new daemon for a test (which, in this case, could be restarted). And, it's not simple to do - perhaps for many reasons, but at-least because on startup the Windows daemon looks for networks on the host and tidies up any networks it doesn't recognise.