RFR: 8330989: unify os::create_binary_file across Posix platforms

[David Holmes]

On Tue, 23 Apr 2024 14:41:55 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> Seems os::create_binary_file can be unified across Posix platforms.

I think we can fold in the Windows version too and put it in os.cpp with one `WINDOWS_ONLY(xxx)` part

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Changes requested by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18918#pullrequestreview-2018930597