[jdk17u-dev] RFR: 8291733: Remove JFR events that expose hashtable

[Goetz Lindenmaier]

I backport this for parity with 17.0.18-oracle.

Resolved EventNames.java, probably clean anyways.

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Commit messages:
 - backport b7d2bde8e37817e827e685bd675b075c1f29b4c2

Changes: https://git.openjdk.org/jdk17u-dev/pull/4047/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=4047&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8291733
  Stats: 113 lines in 8 files changed: 0 ins; 111 del; 2 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/4047.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/4047/head:pull/4047

PR: https://git.openjdk.org/jdk17u-dev/pull/4047