RFR: 8320522: Remove code related to `RegisterFinalizersAtInit` [v3]

[Coleen Phillimore]

On Wed, 17 Apr 2024 20:38:34 GMT, Dan Heidinga <heidinga at openjdk.org> wrote:

>> Remove the code related to -XX:[+-]RegisterFinalizersAtInit in JDK23.
>> 
>> `make test-tier1` passed with this change
>
> Dan Heidinga has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update ppc template comment too

Looks good!  abstractInterpreter.cpp needs a copyright update.

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Marked as reviewed by coleenp (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18823#pullrequestreview-2007385274