RFR: 8342610: ZGC: Cleanup pre-touching code

[Joel Sikström]

On Mon, 21 Oct 2024 08:15:16 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

> There's a few things that we'd like to cleanup around the pre-touching code.
> * Remove the dependency to ZPhysicalMemoryManager - cleans up the call site
> * Remove unimplemented function pretouch_view (and its friends)
> * Change type from zoffset for the iteration variable - multiple threads update it and it is not guaranteed to stay below the required ZAddressOffsetMax. I can trigger an assert here if I change the code to prime_cache in the higher address range instead of the lower and setting a max heap size that matches ZAddressOffsetMax.

Marked as reviewed by jsikstro (Author).

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PR Review: https://git.openjdk.org/jdk/pull/21600#pullrequestreview-2381416949