Allow to run ds-memory 3.0 on Java 25

[pan3793]

This PR relaxes runtime Java version check - add Java 25 to the allow list, for datasketches-memory 3.0.

I understand that Java 17/21/25 is not supported by datasketches-memory 3.0.2, but I'd like to run it in limited mode with Java 25, as it does on Java 17/21.

Verification:

Have done somke test with Apache Spark, see details at #270 (comment)

I can run integration tests with Spark if datasketches-memory can have a SNAPSHOT or RC release (includes this patch) available on a public Maven repo

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UPDATE:

I have made this change and deployed to our internal Maven repo, and integrated with internal Spark, I confirm all Spark cases work well with Java 25, so I think datasketches-memory 3.0 can work well in limited mode on Java 25, as it does on Java 17/21.

[pan3793]

@leerho, could you please take a look? thank you in advance.

[leerho]

@pan3793,
I have been thinking about your request and looked at your code and found a few more things that needed to be fixed. So instead of this PR, I have submitted a different PR #272, that adds a warning so that users attempting to run this code with Java versions > 11 will get a warning that no off-heap operations can be used. As you can see, if you look at 272, I found a bunch of checkstyle warnings that needed to be fixed as well.

Since 272 supersedes this one, I will close this one.

Thank you for your suggestions on this. Please thoroughly test the new prepare_3.0.3 branch form 272 in your environment to make sure it works with 25 like you expect. Do not expect it to pass tests with Java versions > 11.