[foreign-memaccess+abi] RFR: Change classes into records and fix finality [v2]

[Per Minborg]

On Mon, 19 Sep 2022 13:58:53 GMT, Per Minborg <duke at openjdk.org> wrote:

>> This PR converts some of the regular classes into records. It also fixes some finality issues.
>> 
>> Note: Some methods with a very long method parameter list have their parameter list broken up into separate lines.
>
> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Revert changes to VMStorage

This PR is closed in favour of https://github.com/openjdk/panama-foreign/pull/731

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PR: https://git.openjdk.org/panama-foreign/pull/725