RFR: 8331427: Rename confusingly named ArraysSupport.signedHashCode

[Claes Redestad]

On Tue, 30 Apr 2024 14:38:11 GMT, Pavel Rappo <prappo at openjdk.org> wrote:

> Please review this trivial method rename. While this issue was originally spotted in [another PR], it makes sense to address it separately. Test results are pending; not that I expect failures, but still.
> 
> [another PR]: https://github.com/openjdk/jdk/pull/14831#issuecomment-1655477396

Marked as reviewed by redestad (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/19023#pullrequestreview-2033464010