RFR: 8373913: Refactor serialization tests to use JUnit [v2]

[Roger Riggs]

On Thu, 18 Dec 2025 16:46:26 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Refactor serialization tests to use JUnit.
>> Automated conversion for most annotations.
>> Conditional tests are refactored to use JUnit Enable/DisableIf.
>
> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Cleanup arglist and fix code style

Please review changing from testng to junit.

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PR Comment: https://git.openjdk.org/jdk/pull/28877#issuecomment-3739741588