RFR: 8301005: Clean up Copy::conjoint_*_atomic on windows

[Erik Österlund]

On Wed, 25 Jan 2023 16:12:37 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> The atomic copying code on windows has some logic that has been copy pasted for a bunch of types with the only difference being the type. Unfortunately, the jlong copying is using oop copying (even though the values are not at all oops), which isn't super nice. Moreover, this copy pasted sequence isn't actually using Atomic, even though it's for atomic copying, which also isn't super nice. This needs a cleanup, and this patch aims to fix that.
>
> Marked as reviewed by tschatzl (Reviewer).

Thank you for the reviews, @tschatzl and @stefank!

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PR: https://git.openjdk.org/jdk/pull/12197