RFR: 8344093: Implement JEP 501: Deprecate the 32-bit x86 Port for Removal [v5]

[Magnus Ihse Bursie]

On Tue, 26 Nov 2024 09:48:58 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> WIP, as the JEP is still not targeted. We can review code meanwhile.
>> 
>> Additional testing:
>>  - [x] Linux x86-32 build configure fails by default
>>  - [x] Linux x86-32 build configures well with `--enable-deprecated-ports=yes`
>>  - [x] GHA
>
> Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Sync warning messages

Marked as reviewed by ihse (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/22062#pullrequestreview-2461033036