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

[Matthias Baesken]

> 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

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18918/files
  - new: https://git.openjdk.org/jdk/pull/18918/files/e6ef26c1..de5a05d0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18918&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18918&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18918.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18918/head:pull/18918

PR: https://git.openjdk.org/jdk/pull/18918