build: add shim to call node from wsl

[nadalaba]

On Windows installation of node.exe, WSL shells cannot call node without the extension .exe.
This PR adds a minimal shim to the installation directory that calls the main binary node.exe
Resolves conflicts from and closes #43948

[StefanStojanovic]

The change looks OK to me. Before approving, I have one question: was this validated, and if so, how?

[nadalaba]

@StefanStojanovic well node works from wsl without appending .exe now, so I'd say it's validated

[StefanStojanovic]

That's good, but there are a few more things that could be validated.

For example, run node -p 'process.execPath' from WSL and validate that it points to the intended node.exe. Run where node(cmd)/Get-Command node -All(PowerShell) from the Windows shell to make sure the shin doesn't affect node resolution on Windows (can also run node -p 'process.execPath'). You could also check npm --version; since npm uses node, it should work as well.

The second thing that is worth validating is the MSI installer. Playing with it: install it, repair the installation after deleting the shim manually, upgrade to a new version, and uninstall. These should all work as expected (adding/removing the shim when expected).

While I believe all of these things will work as expected, I'd still like you to try them to make sure all is as it should be.

[nadalaba]

@StefanStojanovic Thanks for the suggestions.

Yes, node resolution works as expected from all shells I tested: cmd, powershell, wsl, msys2, git bash.
where node behaves weirdly from cmd, putting node before node.exe, but that's just because the system32 where.exe utility is drunk. In reality, when node is invoked from cmd, node.exe takes priority over plain node. This happens with all shims (npm/npm.cmd/npm.ps1 for example).

All msi operations (install/uninstall/repair/upgrade to a newer version) work as expected regarding the shim.

If you're interested in getting windows‑node to behave correctly with WSL, #63118 might be relevant. Could you take a look at it?