RFR: 8351851: Update PmemTest to run on AMD64

[Mark Sheppard]

On Thu, 3 Apr 2025 14:48:41 GMT, Ivan Šipka <isipka at openjdk.org> wrote:

> Remove default OS platform linux x86_64, remove @ignores allowing amd64 as a viable OS platform selection

changing the @requires in the main test to
 @requires ((os.arch == "x86_64")|(os.arch == "amd64"))

seems reasonable 

and adding an id to each of the test cases is a good idea

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PR Comment: https://git.openjdk.org/jdk/pull/24416#issuecomment-2812719444