RFR: 8309346: Extend hs_err logging for all VM operations deriving from VM_GC_Operation [v4]

[Thomas Schatzl]

On Mon, 5 Jun 2023 16:59:44 GMT, Daohan Qu <duke at openjdk.org> wrote:

>> This patch implements `cause()` for `VM_GC_Operation` and its derived classes. It follows [JDK-8309210](https://bugs.openjdk.org/browse/JDK-8309210) to provide more detailed info for `VM_GC_Operation`s in hs_err log file.
>
> Daohan Qu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Move impl to .cpp file

Still good.

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Marked as reviewed by tschatzl (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/14287#pullrequestreview-1464465272