Several CI fixes

[m-dzianishchyts]

What does this PR do?

• Fixes PathHandler tests that were failing on Windows.
• Adds windows-latest to CI to catch Windows-specific issues early.
• Adds Java 25 to CI as the latest LTS version.
• Fixes random hanging of integration tests.

Fixes #63.

[m-dzianishchyts]

Could someone please rerun checks? I believe this is an another accidental fall for no known reason yet.

BTW, the end of Java 11 support is coming. I'm wondering if JJava should drop its support anytime soon.

[andrus]

Restarted. FWIW, the failure was on java 21.

End of Java 11 support is only about the Oracle distro (that almost nobody is using). I think it is reasonable to keep supporting Java 11 for the kernel for a few more years. Perhaps, we'll bump it up to 21 in JJava 2.0

[andrus]

And now it failed on Windows.

[m-dzianishchyts]

Unfortunately, Testcontainers does not support the windows-latest runner with its windows containers. The workaround will most likely require a custom runner image, so it's better to just disable the appropriate tests for Windows.

[stariy95]

Hm, one task is already running for more than hour, seems like something is still wrong: https://github.com/dflib/jjava/actions/runs/18777118744/job/53574198684?pr=98