RFR: JDK-8299672: Enhance HeapDump JFR event [v3]

[Matthias Baesken]

> Enhance the JFR Event HeapDump  with the additional interesting fields, compression and overwrite.
> Add some UL logging in case the heap dump writing failed .

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  Some spelling adjustments in metadata.xml

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11864/files
  - new: https://git.openjdk.org/jdk/pull/11864/files/8543c307..76fc3a9c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11864&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11864&range=01-02

  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/11864.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11864/head:pull/11864

PR: https://git.openjdk.org/jdk/pull/11864