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

[Daohan Qu]

> 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

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14287/files
  - new: https://git.openjdk.org/jdk/pull/14287/files/62c1da2c..8d4d729f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14287&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14287&range=02-03

  Stats: 7 lines in 2 files changed: 4 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14287.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14287/head:pull/14287

PR: https://git.openjdk.org/jdk/pull/14287