RFR: 8344093: Implement JEP 501: Deprecate the 32-bit x86 Port for Removal [v6]

[Volker Simonis]

On Wed, 27 Nov 2024 08:21:52 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:
> 
>   Update build docs

Thanks. Looks good now.

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Marked as reviewed by simonis (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/22062#pullrequestreview-2464558586