RFR: 8325464: GCCause.java out of sync with gcCause.hpp [v2]

[Yifeng Jin]

> These two files (`GCCause.java` and `gcCause.hpp`) should be in sync by design, see comments in these two files. However, some recent changes (e.g. [JDK-8240239](https://bugs.openjdk.org/browse/JDK-8240239)) to `gcCause.hpp` were not simultaneously reflected in `GCCause.java`. This patch updates `GCCause.java` to keep sync with latest `gcCause.hpp`.

Yifeng Jin has updated the pull request incrementally with one additional commit since the last revision:

  swap zgc and shenandoah block

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/17766/files
  - new: https://git.openjdk.org/jdk/pull/17766/files/36407800..29224950

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17766&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17766&range=00-01

  Stats: 10 lines in 1 file changed: 5 ins; 5 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17766.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17766/head:pull/17766

PR: https://git.openjdk.org/jdk/pull/17766