RFR: 8304913: Use OperatingSystem, Architecture, and Version in jlink [v3]

[Mandy Chung]

On Fri, 5 May 2023 13:59:37 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Refactor the Platform class of jlink to use jdk.internal.util OperatingSystem and Architecture instead of os.name and os.arch. 
>> They are direct replacements for the Platform enums except for UNKNOWN; its use is refactored to report errors via exceptions.
>> 
>> Neither os.name nor os.arch should be assumed to be changeable; 
>> one test case is removed because it assumes os.name can be changed on the command line.
>
> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Source code cleanup suggested by reviewers

I suggest to remove `Platform::is64Bit` and simply call `Architecture::is64bit`.  Otherwise, looks fine.

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Marked as reviewed by mchung (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13585#pullrequestreview-1415865569