[lworld] RFR: 8373506: [lworld] Disable currently unsupported builds in GHA

[Paul Hübner]

On Thu, 11 Dec 2025 11:32:47 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

> The lworld branch does currently not support zero, Shenandoah GC nor other cpu architectures than x86_64 and aarch64.
> 
> I suggest we disable these builds from being run in GHA, to reduce noise and wasted machine hours.
> 
> Once the these specific VM configurations or features have been implemented for lworld we can reenable the actions.

Thanks.

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Marked as reviewed by phubner (Committer).

PR Review: https://git.openjdk.org/valhalla/pull/1786#pullrequestreview-3568288784