RFR: 8330989: unify os::create_binary_file across platforms [v3]

[Kim Barrett]

On Tue, 30 Apr 2024 07:16:30 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> Seems os::create_binary_file can be unified across Posix platforms. Windows is also rather similar and can be included.
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   drop leading underscore in flag

Looks good.

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Marked as reviewed by kbarrett (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18918#pullrequestreview-2034521871