RFR: 8321626: [testbug] Mark DualWindowTest and ContextMenuNPETest unstable on Linux

[Karthik P K]

On Mon, 11 Dec 2023 13:10:55 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> Until JDK-8321624 and JDK-8321625 are fixed, mark the following two tests as unstable on Linux, meaning they will not be run as part of our nightly headful test runs.
> 
> DualWindowTest - [JDK-8321624](https://bugs.openjdk.org/browse/JDK-8321624)
> ContextMenuNPETest - [JDK-8321625](https://bugs.openjdk.org/browse/JDK-8321625)
> 
> These two tests are causing a lot of noise in our CI headful test runs. By skipping these two tests, we get clean test runs.

LGTM

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Marked as reviewed by kpk (Committer).

PR Review: https://git.openjdk.org/jfx/pull/1302#pullrequestreview-1776721988