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

[Leo Korinth]

On Fri, 2 Jun 2023 15:13:33 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.

(this is not a review) How about using `override` instead of `virtual`? I think it better shows how the method is used, and also create compile time errors if we miss to rename the method during refactoring.

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PR Comment: https://git.openjdk.org/jdk/pull/14287#issuecomment-1576681827