RFR: 8341260: Add Float16 to jdk.incubator.vector [v11]

[Joe Darcy]

On Tue, 12 Nov 2024 12:49:01 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

>> Thanks for catching that; fix and tests added in subsequent push.
>
> Single digit inputs, e.g., `Float16.valueOf"2")` throw as well.

Addressed in most recent push; thanks.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21574#discussion_r1838590898