RFR: 8349532: Refactor ./util/Pem/encoding.sh to run in java [v4]

[Weijun Wang]

On Fri, 7 Feb 2025 14:14:26 GMT, Mikhail Yankelevich <duke at openjdk.org> wrote:

>> * ./util/Pem/encoding.sh is now a java test
>> * also added the validations for the test results, not only an error check
>
> Mikhail Yankelevich has updated the pull request incrementally with one additional commit since the last revision:
> 
>   removed run line

Marked as reviewed by weijun (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/23492#pullrequestreview-2601864259