RFR: 8355444: [java.io] Use @requires tag instead of exiting based on "os.name" property value [v5]

[Brian Burkhalter]

On Tue, 29 Apr 2025 18:31:37 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Use the `@requires` tag instead of obtaining the operating system name from the `os.name` property and then exiting if the test is not run on that operating system.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8355444: Simplify comment about requires tag

I ran 30 repeats on each of the two Linux architectures in the CI with commit 260cb69 included and did not see any failures.

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PR Comment: https://git.openjdk.org/jdk/pull/24860#issuecomment-2842662480