RFR: 8329750: Change Universe functions to return more specific Klass* types [v2]

[Dean Long]

On Mon, 8 Apr 2024 14:02:42 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Hmm. Having two `array_klass` calls were not intentional. I accepted Dean's suggestion in the GitHub UI, but that didn't remove the old `array_klass`. I think I'll revert that change given that it is not important to devirtualize this.
>
> Oh good because I was going to need a lot more coffee to understand why there was a second call.  Thanks.

Why devirtualize elsehwere but not here?  Maybe it's not a big deal.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18652#discussion_r1558671690