RFR: 8365072: Refactor tests to use PEM API (Phase 2) [v4]

[Mikhail Yankelevich]

On Tue, 21 Oct 2025 17:40:47 GMT, Anthony Scarpino <ascarpino at openjdk.org> wrote:

>> Mikhail Yankelevich has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
>> 
>>   removed pemrecord usage
>
> Changes look good.

@ascarpino Thank you for your review!  /integrate

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PR Comment: https://git.openjdk.org/jdk/pull/27194#issuecomment-3429870823