RFR: 8339783: Implement JEP 479: Remove the Windows 32-bit x86 Port [v22]

[Magnus Ihse Bursie]

On Mon, 4 Nov 2024 19:27:59 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> This is the implementation of [JEP 479: _Remove the Windows 32-bit x86 Port_](https://openjdk.org/jeps/479).
>> 
>> This is the summary of JEP 479:
>>> Remove the source code and build support for the Windows 32-bit x86 port. This port was [deprecated for removal in JDK 21](https://openjdk.org/jeps/449) with the express intent to remove it in a future release.
>
> Magnus Ihse Bursie has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Also remove __cdecl
>  - Also remove __stdcall on tests

I created https://bugs.openjdk.org/browse/JDK-8343560 to track the possible removal of `JNICALL` in the JDK source. Ultimately, we need to decide if it is worth the churn, or if we should keep it "just in case" some future platform will require a special keyword in that location (utterly unlikely as it might seem). If we go ahead with it, there are additional "downstream" fixes that needs to go with it, I highlighted some in the JBS issue.

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PR Comment: https://git.openjdk.org/jdk/pull/21744#issuecomment-2455537378