RFR: 8254: Allow primitive types in converters [v2]

[Marcus Hirt]

On Tue, 10 Sep 2024 12:38:36 GMT, Ralf Schmelter <rschmelter at openjdk.org> wrote:

>> This allows primitive types in converters.
>
> Ralf Schmelter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Incorporated feedback

Don't forget to do /integrate as suggested by the bot.

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PR Comment: https://git.openjdk.org/jmc/pull/584#issuecomment-2341825860