[foreign-memaccess+abi] RFR: Add benchmark

[Per Minborg]

On Fri, 16 Dec 2022 12:35:23 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposed to add a new benchmark outlining potential performance gains with the FFM API in internal JDK classes.

All sizes:


![image](https://user-images.githubusercontent.com/7457876/208385153-e72654ab-69d4-470e-9d54-77cfac41c06a.png)


Smaller sizes:

![image](https://user-images.githubusercontent.com/7457876/208385543-b0fe0e48-952d-4120-ba6d-895bd191fcb0.png)

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PR: https://git.openjdk.org/panama-foreign/pull/761