[jdk25u] RFR: 8320836: jtreg gtest runs should limit heap size

[duke]

On Tue, 9 Sep 2025 01:54:24 GMT, Rui Li <duke at openjdk.org> wrote:

> A clean backport for https://bugs.openjdk.org/browse/JDK-8320836.
> 
> This patch limits the gtest max heap size. In the original [JBS](https://bugs.openjdk.org/browse/JDK-8320836), there was already a customer report saying CI pipeline gtest failed due to large heap. Backporting this patch can benefit non tip customers. Running tests. In tip for ~2 months.

@rgithubli 
Your change (at version 6a8feb326c4a862b10f3d6d6b0bfbcfe01cc9f9a) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk25u/pull/175#issuecomment-3275435915