RFR: 8319522: Consolidate heap dump writer and other utilities [v2]

[Yi Yang]

> Move heap dump writer to heapdumpcompression.hpp and rename it to heapdumpwriter.hpp so that all heapdump utilities appears in the same file. A further refactor is remove AbstractDumpWriter and use DumpWriter directly.

Yi Yang has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  8319522: Consolidate heap dump writer and other utilities

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Changes: https://git.openjdk.org/jdk/pull/16520/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16520&range=01
  Stats: 1689 lines in 6 files changed: 846 ins; 842 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16520.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16520/head:pull/16520

PR: https://git.openjdk.org/jdk/pull/16520