RFR: 8322770: Implement C2 VectorizedHashCode on AArch64 [v2]

[Mikhail Ablakatov]

On Wed, 21 Aug 2024 15:19:39 GMT, Andrew Haley <aph at openjdk.org> wrote:

> P.S. If T is unsigned, there is no overflow. The desired result is mod 2**n, by the definition of the unsigned integer types.

The idea behind `no_overflow` was to allow user to verify that the result is the exact representation of `v**p` and not just `mod 2**n`. Since this is not required, I'll remove the parameter and the assertions and add `std::is_unsigned<T>::value` constraint instead.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18487#discussion_r1725317718