RFR: 8331941: Make CollectedHeap::parallel_object_iterator public

[Thomas Schatzl]

On Wed, 8 May 2024 15:01:54 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple (or even trivial) change of making an api public so that one can drop the `friend` declaration.

Trivial.

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Marked as reviewed by tschatzl (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/19141#pullrequestreview-2046219831