Backport Candidate: JDK-8332271/ JDK-8353950 (PR #24614)

[Matthias Bläsing]

Hello,

I'd like to ask whether a backport of:

https://github.com/openjdk/jdk/pull/24614

to the stabilisation branch of JDK-25 would have a chance to be
accepted. The PR fixes two issues:

JDK-8332271: Reading data from the clipboard from multiple threads crashes the JVM (P3)
JDK-8353950: Clipboard interaction on Windows is unstable (P4)

The fix is pretty self contained in four files (one being a new test)
and while changes are done in common code, they only affect windows
clipboard implementation as on all other platforms the called methods
are no-ops.

While JDK-8353950 is a P4, for Apache NetBeans users made it clear,
that they consider a usable clipboard essential.

I already did a local cherry-pick from master to jdk25 and that applied
cleanly. Building the JDK though is a multi-hour project for me and
before starting that quest I wanted to gather feedback here.

Thank you

Matthias