[foreign-memaccess+abi] RFR: 8303888: Add AddressLayout.withoutTargetLayout [v2]

[Maurizio Cimadamore]

On Thu, 9 Mar 2023 12:21:32 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> This PR proposes to add a `AddressLayout.withoutTargetLayout()` method for symmetry reasons. This allows  AddressLayout to be converted back to raw addresses.
>> 
>> Discussion point: Should this method require native access?
>
> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update after comments

Marked as reviewed by mcimadamore (Committer).

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PR: https://git.openjdk.org/panama-foreign/pull/815