[SKIP SOF-TEST] .github: disable windows Zephyr builds

[kv2019i]

The Windows Zephyr builds are failing due to changes in upstream Zephyr. We have no maintainer for these builds, so disabling the jobs for now.

[Copilot]

Pull request overview

This PR disables Windows Zephyr builds in the GitHub Actions workflow due to upstream breaking changes and lack of maintainer support for the Windows build environment.

• Adds conditional if: false to disable the build-windows job
• Updates comments explaining the reason for disabling Windows builds

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[kv2019i]

Example failures with current SOF main:
https://github.com/thesofproject/sof/actions/runs/20082364368/job/57612214740?pr=10424

 [477/498] Generating kobject_prebuilt_hash_preprocessed.c
FAILED: [code=1] zephyr/kobject_prebuilt_hash_preprocessed.c D:/a/sof/sof/workspace/build-ptl/zephyr/kobject_prebuilt_hash_preprocessed.c 
C:\Windows\system32\cmd.exe /C "cd /D D:\a\sof\sof\workspace\build-ptl\zephyr && GPERF-NOTFOUND --output-file kobject_prebuilt_hash_preprocessed.c --multiple-iterations 10 kobject_prebuilt_hash.gperf"
'GPERF-NOTFOUND' is not recognized as an internal or external command,
operable program or batch file.
ninja: build stopped: subcommand failed.

[kv2019i]

Sorry for the noise. V3 passes yamllint, but compare-win-linux fails still. I don't fully understand the if logic in compare-windows-linux job definition and yamllint educated me that I cannot have two "if" cases for a single job.

[tmleman]

I assume it's not possible to skip this step only for PTL. I actively use a setup with Windows and it would be sad if it became unusable.

[kv2019i]

@tmleman wrote:

I assume it's not possible to skip this step only for PTL. I actively use a setup with Windows and it would be sad if it became unusable.

I sense a volunteer. :) Can you look at the failure? Any idea how to fix this in the github workflow? (UPDATE: not this PR, but the failrues we have with build-windows ).

[kv2019i]

Windows build fixed, this no longer needed.