RFR: 8325621: Improve jspawnhelper version checks [v2]

[Chad Rakoczy]

On Mon, 11 Mar 2024 19:12:33 GMT, Chad Rakoczy <duke at openjdk.org> wrote:

>> Fix for [8325621](https://bugs.openjdk.org/browse/JDK-8325621)
>> 
>> Updates jspawnhelper to check that JDK version and jspawnhelper version are the same. Updates test to include check for version. Also tested manually by replacing jspawnhelper with incorrect version to confirm that check works.
>
> Chad Rakoczy has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Code cleanup

Thanks for all this feedback! I am going to try and see if we can pass the full version string.

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PR Comment: https://git.openjdk.org/jdk/pull/18204#issuecomment-1992241562