RFR: 8356985: Use "stdin.encoding" in Console's read*() methods [v4]

[Naoto Sato]

On Wed, 21 May 2025 18:07:39 GMT, Justin Lu <jlu at openjdk.org> wrote:

>>> There is script.exp, but it tests sun.stdout.encoding, not stdout.encoding.
>> 
>> It is addressed in this PR
>
> I think the JBS bug ID needs to be added to `CharsetTest.java` as well then.

Bugid added to the test. Additionally replaced testsrc/jdk/classes with Utils ones

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PR Review Comment: https://git.openjdk.org/jdk/pull/25271#discussion_r2101014981