RFR: 8364351: ZGC: Replace usages of ZPageAgeRange() with ZPageAgeRangeAll

[Joel Sikström]

On Wed, 30 Jul 2025 14:59:15 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> Hello,
>> 
>> Following up on [JDK-8357053](https://bugs.openjdk.org/browse/JDK-8357053) and [JDK-8358586](https://bugs.openjdk.org/browse/JDK-8358586), this RFE adds a new pre-defined ZPageAge iterator called ZPageAgeRangeAll to iterate over all ages. ZPageAgeRangeAll replaces the usage of `ZPageAgeRange()`, and the ZPageAge gtest is expanded to cover this.
>> 
>> Testing:
>> * Oracle's tier 1-4
>
> Marked as reviewed by stefank (Reviewer).

Thanks for the reviews! @stefank @xmas92

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PR Comment: https://git.openjdk.org/jdk/pull/26549#issuecomment-3143194221