RFR: 8348349: Refactor CDSConfig::is_dumping_heap() [v3]

[Ioi Lam]

> Please review this small clean up:
> 
> `HeapShared::can_write()` and `CDSConfig::is_dumping_heap()` are both for deciding whether CDS should dump heap objects. I removed the former and consolidated all the logic to the latter.
> 
> I also updated the logging message in case heap objects cannot be dumped.
> 
> I also updated VMProps to clarify what `vmCDSCanWriteArchivedJavaHeap()` means.

Ioi Lam has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:

 - Merge branch 'master' into 8348349-refactor-heap-shared-can-write
 - @matias9927 comment
 - Fixed whitespace
 - Fixed 32-bit build
 - 8348349: Refactor HeapShared::can_write()

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/23249/files
  - new: https://git.openjdk.org/jdk/pull/23249/files/a6a77ca7..846e99cb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23249&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23249&range=01-02

  Stats: 29621 lines in 1223 files changed: 14643 ins; 7811 del; 7167 mod
  Patch: https://git.openjdk.org/jdk/pull/23249.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23249/head:pull/23249

PR: https://git.openjdk.org/jdk/pull/23249