RFR: 8292681: Add JMH for ProtectionDomain [v3]

[Sean Mullan]

On Mon, 29 Aug 2022 13:56:28 GMT, Eric Caspole <ecaspole at openjdk.org> wrote:

>> Add a JMH for ProtectionDomain related to current work on JDK-8292375. Also, add the InMemoryJavaCompiler to the JMH jar, to generate the classes needed for this test and will be useful for future class loading JMH too.
>
> Eric Caspole has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Changes from advice from Sean M

Marked as reviewed by mullan (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/9950