pal: Migrate delayload to windows-sys from winapi

[damanm24]

Addressing a follow-up item from: #2633, to fixup pal to move away from winapi usage as it's no longer supported.

[github-actions]

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[Copilot]

Pull request overview

This PR continues the repo’s migration away from winapi by updating pal’s delay-load helper and removing winapi usage from the Windows DNS resolver bindings in consomme.

Changes:

• Remove winapi “keepalive” usage from consomme’s Windows DNS API bindings and drop the winapi dependency from that crate.
• Update pal::delayload! to use windows-sys (and introduce windows-result) instead of winapi.
• Add unit tests for pal::delayload! behavior (present/missing functions and DLLs).

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
vm/devices/net/net_consomme/consomme/src/dns_resolver/windows/api.rs	Removes the winapi keepalive import; continues using pal::delayload! with windows-sys DNS types.
vm/devices/net/net_consomme/consomme/Cargo.toml	Drops winapi from Windows-only dependencies.
support/pal/src/windows.rs	Migrates delayload! internals away from winapi, updates Win32 error/HRESULT conversion, and adds tests.
support/pal/Cargo.toml	Adds windows-result and a windows-sys dependency block for pal.
Cargo.toml	Adds workspace dependency entry for windows-result.
Cargo.lock	Updates lockfile for dependency graph changes.